Results 31 to 40 of about 3,051,692 (290)

Comparisons of the TOMS aerosol index with Sun‐photometer aerosol optical thickness: Results and applications [PDF]

Journal of Geophysical Research: Atmospheres, 1999
A nearly 20‐year global data set (1979–1994 and 1996 to the present) of tropospheric absorbing aerosols has been developed from total ozone mapping spectrometer (TOMS) backscattered radiance measurements in the range from 331 to 380 nm. The occurrence of aerosols is derived directly from measured backscattered radiances and is represented by a quantity
N. C. Hsu, J. R. Herman, O. Torres, B. N. Holben, D. Tanre, T. F. Eck, A. Smirnov, B. Chatenet, F. Lavenu   +8 more
openaire   +1 more source

Modeling the distribution of the volcanic aerosol cloud from the 1783–1784 Laki eruption [PDF]

, 2006
We conducted simulations of the atmospheric transformation and transport of the emissions of the 1783–1784 Laki basaltic flood lava eruption (64.10°N, 17.15°W) using the NASA Goddard Institute for Space Studies modelE climate model coupled to a sulfur ...
Alan Robock, Thorvaldur Thordarson, Dorothy Koch, Oman, L., Stenchikov, G. L., Koch, D., Drew T. Shindell, Chaochao Gao, Robock, A., Gao, C. C., Georgiy L. Stenchikov, Thordarson, T., Shindell, D. T., Luke Oman   +13 more
core   +1 more source

Retrieving aerosol height from the oxygen A band: a fast forward operator and sensitivity study concerning spectral resolution, instrumental noise, and surface inhomogeneity [PDF]

Atmospheric Measurement Techniques, 2014
Hyperspectral radiance measurements in the oxygen A band are sensitive to the vertical distribution of atmospheric scatterers, which in principle allows the retrieval of aerosol height from future instruments like TROPOMI, OCO2, FLEX, and CarbonSat ...
A. Hollstein, J. Fischer
doaj   +1 more source

Aerosol optical depth retrieval from the EarthCARE Multi-Spectral Imager: the M-AOT product [PDF]

Atmospheric Measurement Techniques, 2023
The Earth Explorer mission Earth Clouds, Aerosols and Radiation Explorer (EarthCARE) will not only provide profile information on aerosols but also deliver a horizontal context to it through measurements by its Multi-Spectral Imager (MSI).
N. Docter, R. Preusker, F. Filipitsch, F. Filipitsch, L. Kritten, F. Schmidt, F. Schmidt, J. Fischer   +7 more
doaj   +1 more source

Modelling soil dust aerosol in the Bodélé depression during the BoDEx campaign [PDF]

, 2006
We present regional model simulations of the dust emission events during the Bodélé Dust Experiment (BoDEx) that was carried out in February and March 2005 in Chad. A box model version of the dust emission model is used to test different input parameters
Todd, M., J Helmert (16052072), Dubovik, O., Dubovik, O, J. Helmert, B. Heinold, Tegen, I, R. Washington, Helmert, J, Washington, R, Tegen, I., I Tegen (16051628), Heinold, B, M. Todd, Todd, MC, Heinold, B., Martin Todd (4462747), B Heinold (16051742), I. Tegen, O. Dubovik, Washington, R., O Dubovik (8761467), Helmert, J., R Washington (16051622)   +23 more
core   +2 more sources

Optical coherence tomography fast versus regular macular thickness mapping in diabetic retinopathy [PDF]

, 2008
Objective: The purpose of the study was to investigate if absolute values and reproducibility of thickness maps obtained from 2 optical coherence tomography (OCT) scanning protocols, regular high-resolution and fast low-density mode, differ in patients ...
Ceklic, Lala, Maar, Noemi, Neubauer, Aljoscha Steffen   +2 more
core   +1 more source

Weekly periodicities of Aerosol Optical Thickness over Central Europe – evidence of an anthropogenic direct aerosol effect

Atmospheric Chemistry and Physics, 2007
Abstract. Statistical analyses of data from ground-based sun photometer stations in Central Europe are presented. All stations are part of the Aerosol Robotic Network (AERONET), and only data of the highest data quality level 2.0 has been applied. The averages by weekday of Aerosol Optical Thickness (AOT) at a wavelength of 440 nm of 12 of the 14 ...
Bäumer, D., Rinke, R., Vogel, B.
openaire   +9 more sources

Airborne high spectral resolution lidar observation of pollution aerosol during EUCAARI-LONGREX [PDF]

, 2013
Airborne high spectral resolution lidar observations over Europe during the EUCAARI-LONGREX field experiment in May 2008 are analysed with respect to the optical properties of continental pollution aerosol.
A. Fix, Minikin, Andreas, M. Esselborn, Groß, Silke, Abicht, Florian, Fix, Andreas, A. Minikin, Fix, A., Abicht, F., Esselborn, Michael, S. Groß, F. Abicht, Wirth, M., Minikin, A., Esselborn, M., Groß, S., M. Wirth, Wirth, Martin   +17 more
core   +2 more sources

Aerosol Optical Depth Retrievals over Thick Smoke Aerosols using GOES-17

, 2022
Abstract. Severe wildfires generate thick smoke plumes, which degrade particulate matter air quality near the surface. Satellite measurements provide spectacular views of these smoke aerosols and Aerosol Optical Depth (AOD), a columnar measure of aerosol concentration widely used in assessing air quality near the surface.
Xue, Zhixin, Christopher, Sundar
openaire   +2 more sources

Classification of aerosol properties derived from AERONET direct sun data [PDF]

Atmospheric Chemistry and Physics, 2007
Aerosol spectral measurements by sunphotometers can be characterized by three independent pieces of information: 1) the optical thickness (AOT), a measure of the column aerosol concentration, 2) the optical thickness average spectral dependence, given by
G. P. Gobbi, Y. J. Kaufman, I. Koren, T. F. Eck, T. F. Eck   +4 more
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