An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
governmentalprogramsandprojects, etc ; aerosols; climate; color; environment; radiometry; satellites; Show all 7 Subjects
Abstract:
... The Ocean and Land Color Instruments (OLCI) operated onboard the Copernicus Sentinel-3 satellites are providing globally distributed Ocean Color Radiometry (OCR) data products of relevance for environmental and climate applications. This work summarizes results on the assessment of fundamental OCR data from the Operational Baseline 3 Collection OL_L2M.003.01 of OLCI-A and OLCI-B onboard Sentinel-3 ...
governmentalprogramsandprojects, etc ; aerosols; models; reflectance; research; satellites; Asia; Show all 7 Subjects
Abstract:
... Single scattering albedo (SSA) is a key parameter to estimate aerosol direct radiative forcing. However, retrieving SSA from satellite observations is still challenging. In this study, a new method optimizing the aerosol optical model based on four basic aerosol components is developed for retrieving SSA from Moderate Resolution Imaging Spectroradiometer (MODIS) data. The new method takes advantag ...
governmentalprogramsandprojects, etc ; algorithms; environmental protection; satellites; water vapor; China; Show all 6 Subjects
Abstract:
... As the latest members of Chinese Environmental Protection and Disaster Monitoring Satellite Constellation, the first two of HuanjingJianzai-2 (HJ-2) series satellites were launched on 27 September 2020 by China and are usually abbreviated as HJ-2 A/B satellites. The polarized scanning atmospheric corrector (PSAC) is one of main sensors onboard HJ-2 A/B satellites, which is mainly used to monitor a ...
governmentalprogramsandprojects, etc ; aerosols; air quality; algorithms; environment; statistics; China; Show all 7 Subjects
Abstract:
... The Moderate Resolution Imaging Spectroradiometer (MODIS) 3 km aerosol product was released to resolve fine aerosol features and provide regional high-resolution aerosol distributions required by the air quality community. It has been publicly available since the Collection 6 (C6) release. In the Collection 6.1 (C6.1) release, a new surface parameterization scheme has been introduced to improve th ...
governmentalprogramsandprojects, etc ; aerosols; algorithms; data collection; environment; reflectance; satellites; Asia; Show all 8 Subjects
Abstract:
... The deep blue (DB) aerosol algorithm applied to four satellite instruments, AVHRR, SeaWiFS, MODIS, and VIIRS, produced a long-term aerosol data set since 1989. This study first evaluated and compared the accuracy, stability, and continuity of four DB aerosol optical depth (AOD) products in Asia using AErosol RObotic NETwork measurements. Then, the regional AOD spatial distributions, coverages, and ...
governmentalprogramsandprojects, etc ; absorption; aerosols; algorithms; environment; photometers; robots; temporal variation; Show all 8 Subjects
Abstract:
... A recently developed GRASP/Component approach (GRASP: Generalized Retrieval of Atmosphere and Surface Properties) was applied to AERONET (Aeronet Robotic Network) sun photometer measurements in this study. Unlike traditional aerosol component retrieval, this approach allows the inference of some information about aerosol composition directly from measured radiance, rather than indirectly through t ...
governmentalprogramsandprojects, etc ; Landsat; aerosols; algorithms; environment; environmental protection; reflectance; wind speed; Show all 8 Subjects
Abstract:
... The aerosol optical depth (AOD) is a key factor to assess atmospheric environment, and accurate monitoring of it is conducive to the research and environmental protection. The Land Surface Reflectance Code (LaSRC) algorithm has been used to retrieve AOD from fine resolution satellite instruments, including the Landsat-8 and Sentinel-2. This study evaluated the AODs against the in situ data (i.e., ...
governmentalprogramsandprojects, etc ; aerosols; algorithms; climatology; monsoon season; research; standard deviation; Italy; Show all 8 Subjects
Abstract:
... This study used Angstrom Exponent (AE) relationship with Aerosol Optical Depth (AOD) obtained from space-based direct sky-radiometer of Moderate Resolution Imaging Spectroradiometer (MODIS) and direct Sun algorithm surface-based AERONET network (level 2.0 version 3) to evaluate monsoon season (June–September) aerosol optical depth and characterization at 7 Italy sites: IMAA_POTENZA (40.60N, 15.72E ...
governmentalprogramsandprojects, etc ; aerosols; biomass; biomass burning; pollution; research; solar radiation; Vietnam; Show all 8 Subjects
Abstract:
... The spatiotemporal distribution and characterization of aerosol optical properties in the north of Vietnam were investigated extensively using the long-term measurements obtained from Moderate Resolution Imaging Spectroradiometer (MODIS) (from 2010 to 2019) and two Aerosol Robotic Network (AERONET) stations (Nghia Do, Hanoi City, from 2010 to 2019 and Son La from 2012 to 2019) located in fast-deve ...
governmentalprogramsandprojects, etc ; aerosols; atmospheric chemistry; climate; data collection; dust; environment; temperature; Australia; Show all 9 Subjects
Abstract:
... Validated dust and aerosol datasets provide valuable information for dust and other atmospheric research. A reanalysis product called ‘MERRA-2’ developed by NASA's Global Modeling and Assimilation Office (GMAO) in recent years provides long-term, high frequency, global coverage aerosol simulations, in terms of AOD (aerosol optical depth) and dust AOD (DAOD). The AOD assimilation system including A ...
governmentalprogramsandprojects, etc ; aerosols; climate; climate change; data collection; particle size; research; satellites; China; Show all 9 Subjects
Abstract:
... Aerosol optical depth (AOD) products provided by satellite sensors are widely used in climate modeling and climate change research. However, inconsistencies between products can cause large biases. It is necessary to integrate multiple satellite aerosol products to produce a consistent and high-quality aerosol record that satisfies the requirements of climate research users. To effectively combine ...
Jeffrey S. Reid; Amanda Gumber; Jianglong Zhang; Robert E. Holz; Juli I. Rubin; Peng Xian; Alexander Smirnov; Thomas F. Eck; Norman T. O’Neill; Robert C. Levy; Elizabeth A. Reid; Peter R. Colarco; Angela Benedetti; Taichu Tanaka
governmentalprogramsandprojects, etc ; aerosols; algorithms; biomass; climate; dust; models; photometers; photometry; prediction; satellites; uncertainty; Show all 12 Subjects
Abstract:
... Although satellite retrievals and data assimilation have progressed to where there is a good skill for monitoring maritime Aerosol Optical Depth (AOD), there remains uncertainty in achieving further degrees of freedom, such as distinguishing fine and coarse mode dominated species in maritime environments (e.g., coarse mode sea salt and dust versus fine mode terrestrial anthropogenic emissions, bio ...
Cheng Chen; Oleg Dubovik; Pavel Litvinov; David Fuertes; Anton Lopatin; Tatyana Lapyonok; Christian Matar; Yana Karol; Juergen Fischer; Rene Preusker; Andreas Hangler; Michael Aspetsberger; Lukas Bindreiter; Daniel Marth; Julien Chimot; Bertrand Fougnie; Thierry Marbach; Bojan Bojkov
governmentalprogramsandprojects, etc ; aerosols; algorithms; climate; color; environment; foams; geometry; isotropy; reflectance; satellites; wind speed; Show all 12 Subjects
Abstract:
... The Ocean and Land Color Instrument (OLCI) onboard the Copernicus Sentinel-3A satellite is a medium-resolution and multi-spectral push-broom imager acquiring radiance in 21 spectral bands covering from the visible to the far near-infrared. These measurements are primary dedicated to land & ocean color applications, but actually include also reliable information for atmospheric aerosol and surface ...
governmentalprogramsandprojects, etc ; climatology; dust; environment; forest fires; particle size; smoke; spring; summer; Arctic region; Show all 10 Subjects
Abstract:
... GEOS-Chem TOMAS (GCT) simulations of AERONET-inversion products during 2015 were compared with AERONET-inversion products from the multi-year climatology of AboEl-Fetouh et al. (2020) (AeF) and for 2015 over 5 stations in the North American and European Arctic. The GCT simulations of particle size distributions (PSD) did not capture a spring to summer radius increase of the fine mode (FM) peak obs ...
governmentalprogramsandprojects, etc ; aerosols; air quality; algorithms; atmospheric pressure; models; pollution; reflectance; satellites; uncertainty; vegetation; China; Show all 12 Subjects
Abstract:
... Due to the advantage of geostationary satellites, Himawari-8/AHI can provide near-real-time air quality monitoring over China with a high temporal resolution. Satellite-based aerosol optical depth (AOD) retrieval over land is a challenge because of the large surface contribution to the top of atmosphere (TOA) signal and the uncertainty of aerosol modes. Here, by combining satellite TOA reflectance ...
governmentalprogramsandprojects, etc ; Internet; Landsat; aerosols; algorithms; digital elevation models; ozone; radiative transfer; reflectance; water vapor; Show all 10 Subjects
Abstract:
... The 30 m resolution Landsat data have been used for high resolution aerosol optical depth (AOD) retrieval based on radiative transfer models. In this paper, a Landsat-8 AOD retrieval algorithm is proposed based on the deep neural network (DNN). A total of 6390 samples were obtained for model training and validation by collocating 8 years of Landsat-8 top of atmosphere (TOA) data and aerosol roboti ...
governmentalprogramsandprojects, etc ; aerosols; case studies; land cover; river deltas; spectrometers; uncertainty; urbanization; China; Yangtze River; Show all 10 Subjects
Abstract:
... Due to the significant spatial variation of the performance of Moderate Resolution Imaging Spectrometer (MODIS) aerosol optical depth (AOD) retrievals, validation is very important for applications of MODIS AOD products at regional scales. This study presents a comparative analysis of Collection 6.1 MODIS AOD retrievals and ground measurements from five local sites and one Aerosol Robotic Network ...
governmentalprogramsandprojects, etc ; aerosols; autumn; carbon; energy; light intensity; models; power generation; satellites; solar radiation; winter; China; Show all 12 Subjects
Abstract:
... Photovoltaic (PV) power generation will become one of the main energy sources to achieve goals of carbon peak and carbon-neutral in China in the future. However, serious haze events have occurred frequently due to massive anthropogenic emissions in autumn and winter in China and resulted in a significant reduction of solar radiation reaching the Earth's surface. In this study, we conducted modific ...
governmentalprogramsandprojects, etc ; aerosols; global positioning systems; metadata; research; seasonal variation; standard deviation; water vapor; Iberian Peninsula; Show all 9 Subjects
Abstract:
... This work analyzes the integrated water vapor (IWV) measured at six Aerosol Robotic Network (AERONET) stations with nearby global navigation satellite system (GNSS) in the Iberian Peninsula for the period 2007–2018. It is shown that both instruments have a high correlation (R² > 0.91), with small mbe below 1.5 mm and standard deviation (SD) below 2 mm. However, some dependences have been observed ...
... Black carbon (BC) absorption aerosol optical depth (AAODBC) defines the contribution of BC in light absorption and is retrievable using sun/sky radiometer measurements provided by Aerosol Robotic Network (AERONET) inversion products. In this study, we utilized AERONET-retrieved depolarization ratio (DPR, δp), single scattering albedo (SSA, ω), and Ångström Exponent (AE, å) of version 3 level 2.0 p ...