Intex 301 N Fmu Remote App Download

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Amber J. Soja earned her PhD in Environmental Sciences from the University of Virginia, Charlottesville, VA in January 2004. She is currently an Associate Research Fellow at the National Institute of Aerospace and is resident in the Climate Science and Chemistry and Dynamics Branches of Atmospheric Sciences at the NASA Langley Research Center. She has 25 years of research experience in using remotely-sensed and GIS data to explore the interactions between fire, the biosphere, and atmosphere, as our weather and climate change. She has taken part in and led numerous interdisciplinary, national and international field campaigns that investigated satellite-defined fire behavior and emissions, and the feedbacks between fire, the biosphere, weather and climate, primarily in remote Siberia (e.g., FireBear, INTEX-A, INTEX-B, TexAQS, ARCTAS and FIREX-AQ).

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Asian dust events occur frequently during the boreal spring season. Their optical properties have been analyzed by using a combination of source region (ground-based and satellite) and remote Pacific Ocean (aircraft) measurements during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B) field campaign which lasted from 7 April to 15 May 2006. A strong dust event originating from the Gobi Desert and passing over the Xianghe surface site on 17 April 2006 has been extensively analyzed. The surface averaged aerosol optical depth (AOD) values increased from 0.17 (clear sky) to 4.0 (strong dust), and the Angstrm exponent () dropped from 1.26 (clear sky) to below 0.1. Its total downwelling SW flux over the Xianghe site (thousands of kilometers away from the dust source region) is only 46% of the clear-sky value with almost no direct transmission and nearly double the diffuse SW clear-sky value. This event was also captured 6 days later by satellite observations as well as the UND/NASA DC-8 aircraft over the eastern Pacific Ocean. The DC-8 measurements in the remote Pacific region further classified the plumes into dust dominant, pollution dominant, and a mixture of dust and pollution events. HYSPLIT backward trajectories not only verified the origins of each case we selected but also showed (1) two possible origins for the dust: the Gobi and Taklimakan deserts; and (2) pollution: urban areas in eastern China, Japan, and other industrialized cities east of the two deserts. Based on the averaged satellite retrieved AOD data (0.5 0.5 grid box), declining AOD values with respect to longitude demonstrated the evolution of the transpacific transport pathway of Asian dust and pollution over the period of the field campaign.

6.13 Aerosol retrievals using airborne lidar and MODIS measurementsRichard A. Ferrare, NASA/LaRC, Hampton, VA; and E. V. Browell, Y. Kaufman, J. F. Leon, M. Chin, C. Butler, V. G. Brackett, S. Burton, G. Chen, A. Clarke, P. B. Russell, J. Redemann, and L. A. RemerProfiles of aerosol optical properties derived from retrieval algorithms that combine airborne lidar multiwavelength backscatter and MODIS measurements are presented. These retrievals include techniques that employ a combination of measured radiances and aerosol optical thickness and particle size measurements from MODIS along with multiwavelength lidar backscatter measurements to derive profiles of aerosol fine mode fraction and effective radius. Multiwavelength lidar profiles of aerosol backscattering acquired by the NASA Langley airborne DIAL system over the Pacific Ocean during the TRAnsport and Chemical Evolution over the Pacific (TRACE-P, 2001) campaign and over eastern U.S. coastal region during the Intercontinental Chemical Transport Experiment-North America (INTEX-NA, 2004) campaign are used in the retrievals. Results from these retrievals are evaluated using airborne in situ and remote sensing measurements. During INTEX-NA, bias differences between the aerosol extinction values retrieved from the combined lidar+MODIS retrievals (588 nm) and the in situ measurements were about 0.007 km-1 (13%). Profiles of aerosol effective radius and fine mode fraction derived from the combined lidar+MODIS retrievals are also examined using airborne in situ measurements. Aerosol extinction profiles simulated by the Goddard Chemistry Aerosol Radiation and Transport (GOCART) global aerosol transport model for these campaigns are evaluated using the lidar retrieval results. During TRACE-P, which occurred over the western Pacific Ocean during March-April 2001, the GOCART aerosol extinction profiles were generally 10-40% lower than profiles derived from the airborne DIAL system; greatest relative differences were near the top of the boundary layer (~1 km). During INTEX-NA, which occurred over the northeastern U.S. and western Atlantic Ocean during July-August 2004, the GOCART aerosol extinction profiles showed better agreement, with differences generally largest in the lowest 1 km. Results from the combined lidar+MODIS retrievals, comparisons with in situ measurements, and evaluations of the GOCART simulations will be presented.

Coddington, OM, Pilewskie, P, Redemann, J, Platnick, S, Russell, PB, Schmidt, KS, Gore, WJ, Livingston, J, Wind, G, Vukicevic, T (2010). Examining the impact of overlying aerosols on the retrieval of cloud optical properties from passive remote sensing. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 115, D10211.

Abstract

Haywood et al. (2004) show that an aerosol layer above a cloud can cause a bias in the retrieved cloud optical thickness and effective radius. Monitoring for this potential bias is difficult because space-based passive remote sensing cannot unambiguously detect or characterize aerosol above cloud. We show that cloud retrievals from aircraft measurements above cloud and below an overlying aerosol layer are a means to test this bias. The data were collected during the Intercontinental Chemical Transport Experiment (INTEX-A) study based out of Portsmouth, New Hampshire, United States, above extensive, marine stratus cloud banks affected by industrial outflow. Solar Spectral Flux Radiometer (SSFR) irradiance measurements taken along a lower level flight leg above cloud and below aerosol were unaffected by the overlying aerosol. Along upper level flight legs, the irradiance reflected from cloud top was transmitted through an aerosol layer. We compare SSFR cloud retrievals from below-aerosol legs to satellite retrievals from the Moderate Resolution Imaging Spectroradiometer (MODIS) in order to detect an aerosol-induced bias. In regions of small variation in cloud properties, we find that SSFR and MODIS-retrieved cloud optical thickness compares within the uncertainty range for each instrument while SSFR effective radius tend to be smaller than MODIS values (by 1-2 mu m) and at the low end of MODIS uncertainty estimates. In regions of large variation in cloud properties, differences in SSFR and MODIS-retrieved cloud optical thickness and effective radius can reach values of 10 and 10 mu m, respectively. We include aerosols in forward modeling to test the sensitivity of SSFR cloud retrievals to overlying aerosol layers. We find an overlying absorbing aerosol layer biases SSFR cloud retrievals to smaller effective radii and optical thickness while nonabsorbing aerosols had no impact.

Historic and current use pesticides (HUPs and CUPs), with respect to use in the United States and Canada, were identified in trans-Pacific and regional air masses at Mt. Bachelor Observatory (MBO), a remote high elevation mountain in Oregon's Cascade Range located in the United States, during the sampling period of April 2004 to May 2006 (n = 69), including NASA's INTEX-B campaign (spring 2006). Elevated hexachlorobenzene (HCB) and alpha-hexachlorocyclohexane (alpha-HCH) concentrations were measured during trans-Pacific atmospheric transport events at MBO, suggesting that Asia is an important source region for these HUPs. Regional atmospheric transport events at MBO resulted in elevated dacthal, endosulfan, metribuzin, triallate, trifluralin, and chlorpyrifos concentrations, with episodic increases in concentration during some spring application periods, suggesting that the Western U.S. is a significant source region for these CUPs. Endosulfan I, gamma-HCH, and dacthal concentrations were significantly positively correlated (p-value < 0.05) with increased air mass time in Western U.S. agricultural areas. Elevated gamma-HCH concentrations were measured at MBO during both trans-Pacific and regional atmospheric transport events, including regional fire events. In addition to gamma-HCH, elevated sigmachlordane, alpha-HCH, HCB, and trifluralin concentrations were associated with fires in Western North America due to revolatilization of these pesticides from soils and vegetation. Trans-chlordane/cis-chlordane and alpha-HCH/gamma-HCH ratios were calculated and may be used to distinguish between free tropospheric and regional and/or Asian air masses. ff782bc1db