Search Results - "Sayer, M"

The Collection 6 MODIS aerosol products over land and ocean by Levy, R. C, Mattoo, S, Munchak, L. A, Remer, L. A, Sayer, A. M, Patadia, F, Hsu, N. C

“…The twin Moderate resolution Imaging Spectroradiometer (MODIS) sensors have been flying on Terra since 2000 and Aqua since 2002, creating an extensive data set…”
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Global Estimates and Long-Term Trends of Fine Particulate Matter Concentrations (1998–2018) by Hammer, Melanie S, van Donkelaar, Aaron, Li, Chi, Lyapustin, Alexei, Sayer, Andrew M, Hsu, N. Christina, Levy, Robert C, Garay, Michael J, Kalashnikova, Olga V, Kahn, Ralph A, Brauer, Michael, Apte, Joshua S, Henze, Daven K, Zhang, Li, Zhang, Qiang, Ford, Bonne, Pierce, Jeffrey R, Martin, Randall V

“…Exposure to outdoor fine particulate matter (PM2.5) is a leading risk factor for mortality. We develop global estimates of annual PM2.5 concentrations and…”
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MODIS Collection 6 aerosol products: Comparison between Aqua's e-Deep Blue, Dark Target, and "merged" data sets, and usage recommendations by Sayer, A. M., Munchak, L. A., Hsu, N. C., Levy, R. C., Bettenhausen, C., Jeong, M.-J.

“…The Moderate Resolution Imaging Spectroradiometer (MODIS) Atmospheres data product suite includes three algorithms applied to retrieve midvisible aerosol…”
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Merging regional and global aerosol optical depth records from major available satellite products by Sogacheva, Larisa, Popp, Thomas, Sayer, Andrew M, Dubovik, Oleg, Garay, Michael J, Heckel, Andreas, Hsu, N. Christina, Jethva, Hiren, Kahn, Ralph A, Kolmonen, Pekka, Kosmale, Miriam, de Leeuw, Gerrit, Levy, Robert C, Litvinov, Pavel, Lyapustin, Alexei, North, Peter, Torres, Omar, Arola, Antti

“…Satellite instruments provide a vantage point for studying aerosol loading consistently over different regions of the world. However, the typical lifetime of a…”
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How should we aggregate data? Methods accounting for the numerical distributions, with an assessment of aerosol optical depth by Sayer, Andrew M, Knobelspiesse, Kirk D

“…Many applications of geophysical data – whether from surface observations, satellite retrievals, or model simulations – rely on aggregates produced at coarser…”
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Global and regional trends of aerosol optical depth over land and ocean using SeaWiFS measurements from 1997 to 2010 by Hsu, N. C, Gautam, R, Sayer, A. M, Bettenhausen, C, Li, C, Jeong, M. J, Tsay, S.-C, Holben, B. N

“…Both sensor calibration and satellite retrieval algorithm play an important role in the ability to determine accurately long-term trends from satellite data…”
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An AeroCom–AeroSat study: intercomparison of satellite AOD datasets for aerosol model evaluation by Schutgens, Nick, Sayer, Andrew M., Heckel, Andreas, Hsu, Christina, Jethva, Hiren, Leeuw, Gerrit de, Leonard, Peter J. T., Levy, Robert C., Lipponen, Antti, Lyapustin, Alexei, North, Peter, Popp, Thomas, Poulsen, Caroline, Sawyer, Virginia, Sogacheva, Larisa, Thomas, Gareth, Torres, Omar, Wang, Yujie, Kinne, Stefan, Schulz, Michael, Stier, Philip

“…To better understand and characterize current uncertainties in the important observational constraint of climate models of aerosol optical depth (AOD), we…”
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Validation of GRASP algorithm product from POLDER/PARASOL data and assessment of multi-angular polarimetry potential for aerosol monitoring by Chen, Cheng, Dubovik, Oleg, Fuertes, David, Litvinov, Pavel, Lapyonok, Tatyana, Lopatin, Anton, Ducos, Fabrice, Derimian, Yevgeny, Herman, Maurice, Tanré, Didier, Remer, Lorraine A, Lyapustin, Alexei, Sayer, Andrew M, Levy, Robert C, Hsu, N. Christina, Descloitres, Jacques, Li, Lei, Torres, Benjamin, Karol, Yana, Herrera, Milagros, Herreras, Marcos, Aspetsberger, Michael, Wanzenboeck, Moritz, Bindreiter, Lukas, Marth, Daniel, Hangler, Andreas, Federspiel, Christian

“…Proven by multiple theoretical and practical studies, multi-angular spectral polarimetry is ideal for comprehensive retrieval of properties of aerosols…”
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Validation and uncertainty estimates for MODIS Collection 6 "Deep Blue" aerosol data by Sayer, A. M., Hsu, N. C., Bettenhausen, C., Jeong, M.-J.

“…The “Deep Blue” aerosol optical depth (AOD) retrieval algorithm was introduced in Collection 5 of the Moderate Resolution Imaging Spectroradiometer (MODIS)…”
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Enhanced Deep Blue aerosol retrieval algorithm: The second generation by Hsu, N. C., Jeong, M.-J., Bettenhausen, C., Sayer, A. M., Hansell, R., Seftor, C. S., Huang, J., Tsay, S.-C.

“…The aerosol products retrieved using the Moderate Resolution Imaging Spectroradiometer (MODIS) collection 5.1 Deep Blue algorithm have provided useful…”
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How Long Is Too Long? Variogram Analysis of AERONET Data to Aid Aerosol Validation and Intercomparison Studies by Sayer, Andrew M.

“…Geophysical data sets derived from satellite sensors, ground/airborne instrumentation, and computational models are often compared against each other. A common…”
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Validation, Stability, and Consistency of MODIS Collection 6.1 and VIIRS Version 1 Deep Blue Aerosol Data Over Land by Sayer, Andrew M., Hsu, N. Christina, Lee, Jaehwa, Kim, Woogyung V., Dutcher, Steven T.

“…The Deep Blue (DB) algorithm has been used to retrieve aerosol optical depth (AOD) and Ångström exponent (AE) over land from multiple satellite instruments,…”
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Uncertainty in Aerosol–Cloud Radiative Forcing Is Driven By Clean Conditions by Gryspeerdt, Edward, Povey, Adam C., Grainger, Roy G., Hasekamp, Otto, Hsu, N. Christina, Mulcahy, Jane P., Sayer, Andrew M., Sorooshian, Armin

“…Atmospheric aerosols and their impact on cloud properties remain the largest uncertainty in the human forcing of the climate system. By increasing the…”
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VIIRS Deep Blue Aerosol Products Over Land: Extending the EOS Long‐Term Aerosol Data Records by Hsu, N. C., Lee, J., Sayer, A. M., Kim, W., Bettenhausen, C., Tsay, S.-C.

“…A primary goal of the Deep Blue (DB) project is to create consistent long‐term aerosol data records, suitable for climate studies, using multiple satellite…”
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A review and framework for the evaluation of pixel-level uncertainty estimates in satellite aerosol remote sensing by Sayer, Andrew M, Govaerts, Yves, Kolmonen, Pekka, Lipponen, Antti, Luffarelli, Marta, Mielonen, Tero, Patadia, Falguni, Popp, Thomas, Povey, Adam C, Stebel, Kerstin, Witek, Marcin L

“…Recent years have seen the increasing inclusion of per-retrieval prognostic (predictive) uncertainty estimates within satellite aerosol optical depth (AOD)…”
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Reconstructing Past Seasonal to Multicentennial‐Scale Variability in the NE Atlantic Ocean Using the Long‐Lived Marine Bivalve Mollusk Glycymeris glycymeris by Reynolds, D. J., Hall, I. R., Slater, S. M., Scourse, J. D., Halloran, P. R., Sayer, M. D. J.

“…The lack of long‐term, highly resolved (annual to subannual) and absolutely dated baseline records of marine variability extending beyond the instrumental…”
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Multi-decadal aerosol variations from 1980 to 2009: a perspective from observations and a global model by Chin, M, Diehl, T, Tan, Q, Prospero, J. M, Kahn, R. A, Remer, L. A, Yu, H, Sayer, A. M, Bian, H, Geogdzhayev, I. V, Holben, B. N, Howell, S. G, Huebert, B. J, Hsu, N. C, Kim, D, Kucsera, T. L, Levy, R. C, Mishchenko, M. I, Pan, X, Quinn, P. K, Schuster, G. L, Streets, D. G, Strode, S. A, Torres, O, Zhao, X.-P

“…Aerosol variations and trends over different land and ocean regions from 1980 to 2009 are analyzed with the Goddard Chemistry Aerosol Radiation and Transport…”
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Effect of the Systemic Neonicotinoid Insecticide Dinotefuran on Leaf-level Photosynthesis in Loblolly Pine (Pinus taeda) by Cone IV, N. J., Blazier, M. A., Adams, J. P., Sayer, M. A. S., Tyree, M. C.

“…Bark beetles (Coleoptera: Curculionidae: Scolytinae) are a common pest in loblolly pine (Pinus taeda L.) plantations, and climate intensification threatens to…”
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A pure marine aerosol model, for use in remote sensing applications by Sayer, A. M., Smirnov, A., Hsu, N. C., Holben, B. N.

“…Retrievals of aerosol optical depth (AOD) and related parameters from satellite measurements typically involve prescribed models of aerosol size and…”
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AERONET-based models of smoke-dominated aerosol near source regions and transported over oceans, and implications for satellite retrievals of aerosol optical depth by Sayer, A. M, Hsu, N. C, Eck, T. F, Smirnov, A, Holben, B. N

“…Smoke aerosols from biomass burning are an important component of the global aerosol system. Analysis of Aerosol Robotic Network (AERONET) retrievals of…”
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