Mar 27
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Global Annual PM2.5 Grids from MODIS, MISR and SeaWiFS Aerosol Optical Depth (AOD), 2001-2010: North America by SEDACMaps Via Flickr: The Global Annual PM2.5 Grids from MODIS, MISR and SeaWiFS Aerosol Optical Depth (AOD) data sets represent a series of three-year running mean grids (1998-2012) of fine particulate matter (solid particles and liquid droplets) that were derived from a combination of MODIS (Moderate Resolution Imaging Spectroradiometer), MISR (Multiangle Imaging SpectroRadiometer) and SeaWIFS (Sea-Viewing Wide Field-of-View Sensor) AOD satellite retrievals. A global decadal (2001-2010) mean PM2.5 concentration grid was also produced and is mapped here. Together the grids provide a continuous surface of concentrations in micrograms per cubic meter of particulate matter 2.5 micrometers or smaller (PM2.5) for health and environmental research. The raster grid cell size is approximately 10 km at the equator, and the extent is from 70 degrees north to 55 degrees south latitude.
The crash of Glory
上周五，NASA 用于获取气候数据的卫星 Glory 由于火箭整流罩未正常分离导致发射失败。此次失败的直接影响是卫星上搭载的总辐照观测计（TIM）需要至少几个月的时间才能找到代用品，可能造成这一系列数据的断档。Glory 上的 TIM 传感器精度比现在 NASA 的 SORCE 卫星上搭载的同类传感器高三倍，如果新老传感器的数据没有一定的重叠，可能由于缺少同时获取的数据而造成新老数据校正的困难。
对大气中气溶胶和颗粒物的气候效应的观测也将被迫推迟。