Aerosol Microtops II sunphotometer observations over Ukraine
Atmospheric aerosols and their impact on climate study are based on measurements by networks of ground-based instruments, satellite sensors, and measurements on portable sunphotometers. This paper presents the preliminary aerosol characteristics obtained during 2009-2012 using portable multi-wavelen...
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| Цитувати: | Aerosol Microtops II sunphotometer observations over Ukraine / V. Bovchaliuk, A. Bovchaliuk, G. Milinevsky, V. Danylevsky, M. Sosonkin, Ph. Goloub // Advances in Astronomy and Space Physics. — 2013. — Т. 3., вип. 1. — С. 46-52. — Бібліогр.: 8 назв. — англ. |
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| author | Bovchaliuk, V. Bovchaliuk, A. Milinevsky, G. Danylevsky, V. Sosonkin, M. Goloub, Ph. |
| author_facet | Bovchaliuk, V. Bovchaliuk, A. Milinevsky, G. Danylevsky, V. Sosonkin, M. Goloub, Ph. |
| citation_txt | Aerosol Microtops II sunphotometer observations over Ukraine / V. Bovchaliuk, A. Bovchaliuk, G. Milinevsky, V. Danylevsky, M. Sosonkin, Ph. Goloub // Advances in Astronomy and Space Physics. — 2013. — Т. 3., вип. 1. — С. 46-52. — Бібліогр.: 8 назв. — англ. |
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| description | Atmospheric aerosols and their impact on climate study are based on measurements by networks of ground-based instruments, satellite sensors, and measurements on portable sunphotometers. This paper presents the preliminary aerosol characteristics obtained during 2009-2012 using portable multi-wavelength Microtops II sunphotometer. Measurements were collected at different Ukraine sites in Kyiv, Odesa, Lugansk, Rivne, Chornobyl regions. The main aerosol characteristics, namely aerosol optical thickness (AOT) and Angström exponent, have been retrieved and analyzed. Aerosol data processing, ltering and calibration techniques are discussed in the paper.
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Aerosol Microtops II sunphotometer observations over Ukraine
V. Bovchaliuk1∗, A. Bovchaliuk1, G. Milinevsky1,V. Danylevsky2, M. Sosonkin3, Ph. Goloub4
Advances in Astronomy and Space Physics, 3, 46-52 (2013)
© V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky, V.Danylevsky, M. Sosonkin, Ph.Goloub, 2013
1Space Physics Laboratory, Astronomy and Space Physics Department, Taras Shevchenko National University of Kyiv,
64 Volodymyrska Str., 01601 Kyiv, Ukraine
2Astronomical Observatory, Taras Shevchenko National University of Kyiv, 3, Observatorna Str., 04053 Kyiv, Ukraine
3Laboratory of Atmospheric Optics, Main Astronomical Observatory of the NAS of Ukraine,
27, Akademika Zabolotnoho Str., 03680 Kyiv, Ukraine
4Laboratoire d'Optique Atmosphérique, Université des Sciences et Technologies de Lille (Lille1),
59655 Villeneuve d'Ascq Cedex, Lille, France
Atmospheric aerosols and their impact on climate study are based on measurements by networks of ground-based
instruments, satellite sensors, and measurements on portable sunphotometers. This paper presents the preliminary
aerosol characteristics obtained during 2009-2012 using portable multi-wavelength Microtops II sunphotometer.
Measurements were collected at di�erent Ukraine sites in Kyiv, Odesa, Lugansk, Rivne, Chornobyl regions. The
main aerosol characteristics, namely aerosol optical thickness (AOT) and Angström exponent, have been retrieved
and analyzed. Aerosol data processing, �ltering and calibration techniques are discussed in the paper.
Key words: aerosol, atmosphere, Angström exponent, database
instrument and method
The Microtops II is a portable hand-held sun-
photometer for direct solar irradiance measurement
in di�erent wavelengths (see e. g. [5, 8]). Four in-
struments with di�erent spectral channels were used
during observations: two instruments equipped with
�lters for wavelengths 440, 500, 675, 870 and 936 nm;
one for 440, 675, 870, 936 and 1020 nm, and one for
340, 440, 675, 870 and 1020 nm. The Microtops II
advantages are: high accuracy, portability, simplic-
ity in use, and low cost. Furthermore, the instru-
ment can be linked directly to a hand-held GPS re-
ceiver via a serial cable, which allows carrying out
observation at di�erent sites. Obtained characteris-
tics include information on time and location, pres-
sure, temperature, Sun-Earth distance, and the sig-
nal from photodetectors. The aerosol optical thick-
ness (AOT) calculations are performed using a mi-
croprocessor. The instrument can store information
of 800 measurements before data have to be trans-
ferred to computer as ASCII �les. The aerosol char-
acteristics obtained from Microtops II measurements
include AOT, Angström exponent and precipitable
column water vapour. AOT value is determined ac-
cording the Bouguer-Lambert-Beer law:
Iλ = I0λD
−2 exp−τλµ, (1)
where Iλ is the intensity of the light at the wave-
length λ at the observation site, I0λ is the intensity
of the light without the Earth atmosphere, D is the
Sun-Earth distance in astronomical units at the time
of observation, τλ is the optical thickness of all at-
mosphere components, and µ = sec θ is the air mass,
where θ is the solar zenith angle. The optical thick-
ness values were calculated for each direct measure-
ment of the solar irradiance, for di�erent air masses
[8].
Angström exponent is used to estimate the depen-
dence AOT on the λ. Angström exponent is related
to the particle size distribution and depends on the
ratio of the concentration of small to large aerosols.
If the Angström exponent is close to or less than 1.0,
then the coarse mode of aerosol particles dominates
in the atmosphere (with particle diameters 1-10µm),
and if it is greater than 1.5, the �ne mode dominates
(with particle diameters of 0.01-1µm).
data processing
Four Microtops II sunphotometers were used
during the measurement period. Dedicated soft-
ware with three-stage data processing was devel-
oped, and three di�erent levels of data quality were
formed. They are analogues of AERONET data lev-
els1, which consist of: raw measurements (level 1.0),
cloud-screened data (level 1.5), and re-calibrated
data (level 2.0). The sunphotometer calibrations
were performed using the Langley plot technique,
using the method of transfer calibration with the
data obtained by sunphotometer CE318-2 (which
has been located at the AERONET Kyiv site since
∗bovchaliukv@gmail.com
1http://aeronet.gsfc.nasa.gov/
46
Advances in Astronomy and Space Physics V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky et al.
March 2008) [4].
The data of all observations from the Microtops
II instrument were presented similarly to raw level
1.0 data. The level 1.5 data measurements were con-
structed from observations �ltered from haze, cloud
and inaccurate pointing measurements. Dedicated
software with three types of data �ltering was de-
veloped for measurement reconstruction for all spec-
tral bands. The �rst �lter removes cloud screen-
ing data that are beyond 2σ range of session (�ve
measurements) mode AOT. The second �lter expels
measurements that are beyond 2σ range of session
mean AOT, and the third �lter removes data beyond
the 2σ range of the daily mean AOT. The Langley
method (see e. g. [3, 7]) was used for calibrating the
sunphotometer. From (1) we have:
ln(V λ) = ln(V0λD
−2)− τλµ. (2)
In equation (2): V λ is the signal from photodetec-
tors measured by the instrument, V0λ is the signal
from photodetectors without atmosphere. The value
ln(V λ) exhibits a linear dependence, with slope −τλ
and intercept ln(V0λD
−2). The ln(V0λD
−2) value
was retrieved using the Langley plot, and the value
V0λ is the new calibration constant determined from
the intercept.
In order to verify Microtops II measurement re-
liability, a cross-calibration was performed through
transferring parameters from the more accurate
AERONET sunphotometer, e. g. CIMEL CE318 of
the Kyiv site (see e. g. [6, 3]). The light intensity
measured by both instruments must be the same for
simultaneous measurements at the same site. Then,
using (1) for the ratio of the CIMEL CE318 signal
and the Microtops II signal, the correction constant
V Mic
0λ for the Microtops II sunphotometer was deter-
mined from equation:
V CIM
λ /V Mic
λ = V CIM
0λ /V Mic
0λ . (3)
New veri�ed data were formed in the new set of
level 2.0 data, following the calculation and insert
of the new calibration constants. Next, the opti-
cal thickness of Rayleigh scattering was re-calculated
(see e. g. [1]).
Aerosol distribution and behaviour data in the at-
mosphere over Ukraine for the period of 2003-2011,
obtained from the satellite POLDER/PARASOL
and POLDER-2/ADEOS-2 measurements and
AERONET ground-based sunphotometer data, were
analysed earlier [2]. In this paper, the study of
aerosol optical characteristics in several Ukrainian
regions, using Microtops II level 2.0 measurements,
is discussed.
observation results
and case studies
Microtops II sunphotometer observations were
conducted in several regions of Ukraine with the
purpose of studying two main aerosol characteris-
tics: AOT and Angström exponent. The mean AOT
and Angström exponent values were averaged over
the observation period and calculated for Odesa, Lu-
gansk, Chornobyl and Rivne regions. These mea-
surements are presented in Tables 1 � 4. Angström
exponent has been calculated using measurements
at 440 nm and 870 nm wavelengths.
The observations in Kyiv city were carried out on
a regular basis for the entire four-year duration (see
Fig. 1, Fig. 2). There was an increase AOT value ob-
served in May every year, and in June 2010 and July
2011-2012. The peaks of Angström exponent value
at 1.6±0.6 and 1.99±1.0 were observed in August of
2011 and 2012, respectively. This trend can be ex-
plained by a decrease in humidity and an increase in
industrial and transport emissions in the Summer.
The measurements in Odesa (see Table 1) show
the main aerosol characteristic peaks in August 2010
which correspond to a period of forest and peat wild-
�res in Russia. Comparing Aerosol characteristics
over Kyiv and Odesa sites gives similar AOT val-
ues for the same period. For example, AOT at the
870 nm wavelength are approximately 0.09 over Kyiv
in the period from 21 to 25 July 2009, and are 0.13
over Odesa in the period from 26 to 30 July 2009.
Similar results were obtained in 2010, when the AOT
value over Odesa (period from 15 to 18 September)
was close to 0.14, versus a value of 0.09 over Kyiv
(from 19 to 21 September). The results of South to
North transect between Odesa and Kyiv, made on
November 21, 2009, are presented in Fig. 3 and Fig. 4.
AOT values grew in proximity to Kyiv (see Fig. 3)
with minimum values near Uman region. Angström
exponent plot (see Fig. 4) shows increasing of the
aerosol coarse fraction in the Kyiv region.
The measurements in Lugansk from July 1 to Oc-
tober 31, 2010 with Microtops II are shown in Fig. 5
and Fig. 6. Aerosol characteristic monthly means
are presented in Table 2. Using the back-trajectory
analysis it was de�ned that high AOT values in
the �rst half of July are explained by the industrial
airmass coming from the central region of Ukraine.
Airmass from South-West Russian regions and the
North Caucasus was observed over Lugansk site from
July 14 to August 13. AOT maximum values (see
Fig. 5) were observed between August 14 and 18,
2010. This peak can be explained by the airmass
transport from forest and peat wild�re territories in
Russia. This has been con�rmed by back-trajectory
analysis of the Lugansk data. For example, in Au-
gust 12 the observed AOT was equal to 0.18 at
870 nm, and on August 14 AOT values increased to
0.5. After August 18, the wind direction changed
and the airmass from North-West and North regions
of Ukraine was observed over Lugansk. AOT values
decreased and reached minimum in November 2010.
The Angström exponent that month demonstrated
low values (approximately 0.18, see Table 2), which
47
Advances in Astronomy and Space Physics V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky et al.
Fig. 1: AOT mean values at wavelength 870 nm for all
periods of observation in Kyiv and Odesa.
Fig. 2: Angström exponent values between 440 nm and
870 nm for all perionds of observation in Kyiv and Odesa.
Fig. 3: AOT values during Odesa � Kyiv transect mea-
surements in November 21, 2009.
Fig. 4: Angström exponent values during Odesa � Kyiv
transect measurements in November 21, 2009.
indicates the dominance of coarse-mode aerosol par-
ticles. In August the Angström exponent values in
Lugansk increased to 1.3 and became similar to the
values measured in Kyiv in the same period by the
AERONET sunphotometers. It should be noted that
the �ne-mode aerosol particles, produced by biomass
burning, was registered over Ukraine in mid-August
2010.
There were three �eld campaigns (see Table 3) of
observation in the Chornobyl region in the spring-
summer season. Aerosol mean characteristics (AOT
and Angström exponent) exhibit similar values in
all periods of spring observations. Angström ex-
ponent values show that aerosol particles probably
have the same physical properties. AOT values de-
creased at all wavelengths, while the Angström expo-
48
Advances in Astronomy and Space Physics V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky et al.
nent increased in the end of June. More observation
is needed to postulate the explanation of phenom-
ena of Angström exponent increasing and AOT de-
creasing in mid-summer. There were two summer
and one autumn short observation periods in Rivne
(see Table 4). In the other cities, larger AOT and
Angström exponent values were observed in summer
period than in autumn. Angström exponent values
are close to 1.6, which shows dominance of �ne-mode
particles over Rivne in the summer season.
Microtops II measurements were provided during
the Central Ukraine trip from June 14 to 18, 2009.
The most interesting result was obtained on June
16, when observations were carried out along the
road from the Khotsky village in the Kyiv region to
Dnipropetrovsk city (see Fig. 7, Fig. 8). AOT value
peaks were observed near Pershotravneve village (be-
tween 7 and 8 at the morning), at Kremenchuk city
(close to 11 o'clock) and near Myrushyn Rig (at
midday). Measurements were carried out over Kre-
menchyk (a large industrial city) from 9 to 11 o'clock,
in which data exhibits aerosol pollution increasing.
The Angström exponent value has a minimum (see
Fig. 8) that hours.
Other transect measurements were made during
the East Ukrainian trip on August 16�21, 2011. Re-
sults of that observation are shown in Fig. 9. Larger
AOT values are seen in the Lugansk region (August
17�19). Signi�cant decreasing of AOT data corre-
sponds to observations in Zaporizhia (August 19�20)
and Kryviy Rig (August 21). On thosed days the at-
mosphere cleared due to August 16 rainfall in Kryvyi
Rig and a thunderstorm August 17 in Zaporizhia.
The Angström exponent (see Fig. 10) was decreased
those days, which corresponded to the reduction of
�ne-mode of aerosol as a result of the rain.
The comparison of the measurement results in
Kyiv and Odesa shows larger AOT values over Odesa
in 2009 and 2010, and similar aerosol characteristics
in 2011 (see. Fig. 1, 2). Comparison of the data mea-
sured in Kyiv, Lugansk and Odesa in summer-spring
period of 2010 shows similar AOT values over Kyiv
and Lugansk and slightly higher values over Odesa.
Measurement results in Rivne exhibit aerosol char-
acteristics close to data obtained in Kyiv and Odesa.
The atmosphere in the Chornobyl region was clean-
est in the summer time (see Table 3). Observed
Angström exponent values were 1.5 on average over
all regions except Lugansk (results show coarse-mode
particle domination). Heavy industrial emissions in
the Eastern region of Ukraine can explain these rel-
atively low Angström exponent values.
conclusions
The �rst results of the Microtops II sunphotome-
ter measurements in several Ukrainian regions show
the reliability of the instrument and method, as well
as the appropriate skill of observers. The software
with three stage data selection was developed for
sunphotometer data processing. The algorithm al-
lows to create a database with di�erent levels of data
quality: the raw data of level 1.0, the cloud screened
data of level 1.5, and the �nally re-calibrated data
of level 2.0. The Langley plot calibration and the
intercalibration with the Kyiv AERONET CIMEL
CE318-2 instrument was applied to Microtops II sun-
photometer measurements to improve the data qual-
ity. Measurement results show similar average AOT
values over all areas except Chornobyl region where
the values were lower. Angström exponent values
were similar in all regions except Lugansk, which
exhibit domination of �ne-mode particles. Coarse-
mode dominated over Lugansk region in the Summer
of 2010. The preliminary Microtops II measurement
results show that aerosol pollution over Ukraine is
similar to mean values in Europe and 3�5 times less
than, for e. g., in India or China industrial regions.
AOT values vary from 0.05 to 0.21 for the 870 nm
spectral channel, for all periods of observation ex-
cept the Summer 2010 period of wild�res in Russia,
during which AOT increased to 0.7. The �ne aerosol
fraction prevailed in the atmosphere over Ukraine
according the Angström exponent retrievals.
acknowledgement
This publication was supported by Award No.
UKG2-2969-KV-09 of the U.S. Civilian Research
& Development Foundation (CRDF) and by the
projects M/115-2012 and 11BF051-01-12 MON-
molodsport, and F41/106-2012 Derzhinformnauky.
We thank to Thierry Podvin for providing the
CIMEL sunphotometer calibration constants and
to Volodymyr Voytenko for the Lugansk measure-
ments. CIMEL calibration was performed at the
AERONET-EUROPE LOA calibration centre, sup-
ported by ACTRIS European Union Seventh Frame-
work Program FP7/2007-2013 under grant agree-
ment no. 262254.
references
[1] BodhaineB.A., WoodN.B., DuttonE.G. & Slusser J. R.
1999, J. of Atmospheric and Oceanic Technology, 16, 1854
[2] BovchaliukA., MilinevskyG., DanylevskyV. et al. 2013,
Atmospheric Chemistry and Physics Discussions, 13, 2641
[3] IchokuC., LevyR., KaufmanY. J. et al. 2002, J. Geo-
phys. Res.: Atmospheres, 107, 4179
[4] MilinevskyG.P., DanylevskyV.O., GrytsaiA.V. et al.
2012, Advances in Astronomy and Space Physics, 2, 114
[5] MorysM., MimsF.M. III, Hagerup S. et al. 2001, J. Geo-
phys. Res.: Atmospheres, 106, 14573
[6] Porter J.N., MillerM., PietrasC. & Motell C. 2001, J. of
Atmospheric and Oceanic Technology, 18, 765
[7] PosyniakM. & MarkowiczK. 2009, Acta Geophysica, 57,
494
[8] User's Guide Microtops II sunphotometer, Version 5.5,
2003, Solar Light Company Inc., Glenside, Philadelphia,
19038, USA, Document No. MTP06
49
Advances in Astronomy and Space Physics V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky et al.
Fig. 5: AOT values variation over Lugansk, observations
in 2010.
Fig. 6: Angström exponent values variation in 2010 over
Lugansk.
Fig. 7: AOT values during the trip from Kyiv to
Dnipropentrovsk in June 16, 2009.
Fig. 8: Angström exponent values during the trip from
Kyiv to Dnipropentrovsk in June 16, 2009.
50
Advances in Astronomy and Space Physics V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky et al.
Table 1: Aerosol characteristics in the atmosphere over Odesa
Period
AOT
Angström exponent
440 nm 675 nm 870 nm 936 nm 1020 nm
26.7.2009�30.7.2009 0.18±0.06 0.13±0.05 0.12±0.05 0.11±0.05
25.8.2009�15.10.2009 0.16±0.06 0.11±0.05 0.11±0.05 0.11±0.05
13.11.2009�19.11.2009 0.25±0.09 0.17±0.10 0.13±0.10 0.12±0.09 0.95±1.53
28.5.2010�15.6.2010 0.14±0.05 0.10±0.04 0.12±0.04 0.13±0.05
12.8.2010�26.8.2010 0.25±0.15 0.18±0.10 0.17±0.09 0.16±0.07
15.9.2010�18.9.2010 0.20±0.09 0.14±0.05 0.14±0.05 0.15±0.04
5.5.2011�6.5.2011 0.27±0.04 0.15±0.02 0.09±0.02 0.08±0.02 1.69±0.47
1.8.2011�6.8.2011 0.20±0.05 0.11±0.02 0.07±0.02 0.07±0.01 1.59±0.68
Table 2: AOT and Angström exponent values in the atmosphere over Lugansk
Period
AOT
Angström exponent
440 nm 500 nm 675 nm 870 nm 936 nm
1.7.2010�31.7.2010 0.36±0.14 0.32±0.12 0.23±0.09 0.18±0.08 0.16±0.08 1.06±1.22
1.8.2010�31.8.2010 0.51±0.26 0.45±0.23 0.31±0.15 0.21±0.10 0.19±0.09 1.31±1.55
1.9.2010�31.9.2010 0.19±0.10 0.17±0.08 0.14±0.06 0.09±0.05 0.09±0.04 1.01±1.38
1.10.2010�31.10.2010 0.08±0.02 0.10±0.02 0.11±0.02 0.07±0.02 0.07±0.01 0.18±0.50
Table 3: Aerosol characteristics in the atmosphere over Chornobyl region
Period
AOT
Angström exponent
340 nm 440 nm 675 nm 870 nm 1020 nm
3.6.2009�6.6.2009 0.23±0.07 0.20±0.05 0.12±0.03 0.07±0.02 0.05±0.02 1.55±0.78
30.5.2011�3.6.2011 0.26±0.12 0.18±0.08 0.10±0.04 0.06±0.02 0.06±0.02 1.61±1.18
25.5.2012�3.6.2012 0.26±0.05 0.20±0.04 0.12±0.02 0.07±0.02 0.08±0.01 1.58±0.56
23.6.2012�24.6.2012 0.25±0.06 0.18±0.03 0.10±0.01 0.05±0.01 0.06±0.01 1.92±0.51
Table 4: AOT and Angström exponent values in the atmosphere over Rivne
Period
AOT
Angström exponent
340 nm 440 nm 675 nm 870 nm 1020 nm
27.6.2011�5.7.2011 0.42±0.10 0.30±0.07 0.16±0.04 0.10±0.03 0.11±0.03 1.60±0.77
10.9.2011�13.9.2011 0.29±0.07 0.21±0.05 0.12±0.02 0.08±0.01 0.08±0.02 1.48±0.63
4.7.2012�11.7.2012 0.40±0.09 0.29±0.07 0.16±0.04 0.10±0.03 0.09±0.03 1.63±0.76
51
Advances in Astronomy and Space Physics V.Bovchaliuk, A.Bovchaliuk, G.Milinevsky et al.
Fig. 9: AOT values during the East Ukrainian transect
at August 2011.
Fig. 10: Angström exponent values during the East
Ukrainian transect at August 2011.
52
|
| id | nasplib_isofts_kiev_ua-123456789-119430 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 2227-1481 |
| language | English |
| last_indexed | 2025-12-07T16:25:14Z |
| publishDate | 2013 |
| publisher | Головна астрономічна обсерваторія НАН України |
| record_format | dspace |
| spelling | Bovchaliuk, V. Bovchaliuk, A. Milinevsky, G. Danylevsky, V. Sosonkin, M. Goloub, Ph. 2017-06-06T19:29:38Z 2017-06-06T19:29:38Z 2013 Aerosol Microtops II sunphotometer observations over Ukraine / V. Bovchaliuk, A. Bovchaliuk, G. Milinevsky, V. Danylevsky, M. Sosonkin, Ph. Goloub // Advances in Astronomy and Space Physics. — 2013. — Т. 3., вип. 1. — С. 46-52. — Бібліогр.: 8 назв. — англ. 2227-1481 https://nasplib.isofts.kiev.ua/handle/123456789/119430 Atmospheric aerosols and their impact on climate study are based on measurements by networks of ground-based instruments, satellite sensors, and measurements on portable sunphotometers. This paper presents the preliminary aerosol characteristics obtained during 2009-2012 using portable multi-wavelength Microtops II sunphotometer. Measurements were collected at different Ukraine sites in Kyiv, Odesa, Lugansk, Rivne, Chornobyl regions. The main aerosol characteristics, namely aerosol optical thickness (AOT) and Angström exponent, have been retrieved and analyzed. Aerosol data processing, ltering and calibration techniques are discussed in the paper. This publication was supported by Award No. UKG2-2969-KV-09 of the U.S. Civilian Research & Development Foundation (CRDF) and by the projects M/115-2012 and 11BF051-01-12 MONmolodsport, and F41/106-2012 Derzhinformnauky. We thank to Thierry Podvin for providing the CIMEL sunphotometer calibration constants and to Volodymyr Voytenko for the Lugansk measurements. CIMEL calibration was performed at the AERONET-EUROPE LOA calibration centre, supported by ACTRIS European Union Seventh Framework Program FP7/2007-2013 under grant agreement no. 262254. en Головна астрономічна обсерваторія НАН України Advances in Astronomy and Space Physics Aerosol Microtops II sunphotometer observations over Ukraine Article published earlier |
| spellingShingle | Aerosol Microtops II sunphotometer observations over Ukraine Bovchaliuk, V. Bovchaliuk, A. Milinevsky, G. Danylevsky, V. Sosonkin, M. Goloub, Ph. |
| title | Aerosol Microtops II sunphotometer observations over Ukraine |
| title_full | Aerosol Microtops II sunphotometer observations over Ukraine |
| title_fullStr | Aerosol Microtops II sunphotometer observations over Ukraine |
| title_full_unstemmed | Aerosol Microtops II sunphotometer observations over Ukraine |
| title_short | Aerosol Microtops II sunphotometer observations over Ukraine |
| title_sort | aerosol microtops ii sunphotometer observations over ukraine |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/119430 |
| work_keys_str_mv | AT bovchaliukv aerosolmicrotopsiisunphotometerobservationsoverukraine AT bovchaliuka aerosolmicrotopsiisunphotometerobservationsoverukraine AT milinevskyg aerosolmicrotopsiisunphotometerobservationsoverukraine AT danylevskyv aerosolmicrotopsiisunphotometerobservationsoverukraine AT sosonkinm aerosolmicrotopsiisunphotometerobservationsoverukraine AT goloubph aerosolmicrotopsiisunphotometerobservationsoverukraine |