Evaluation of MSG-SEVIRI mineral dust retrieval products over North Africa and the Middle East
Evaluation of MSG-SEVIRI mineral dust retrieval products over North Africa and the Middle East
复制标题
对北非和中东地区 MSG-SEVIRI 矿物粉尘回收产品的评估
DOI:
10.1016/j.rse.2012.07.017
复制
发表时间:
2013
影响因子:
13.5
通讯作者:
Banks J
中科院分区:
文献类型:
--
作者:
Banks J
High temporal resolution observations from the Spinning Enhanced Visible and InfraRed Imager (SEVIRI), on the Meteosat Second Generation satellites, can offer new insights into the processes governing the behaviour of dust sources. Here we evaluate a multi-year, high time-resolution record of dust flagging and dust aerosol optical depth (DAOD) derived from SEVIRI to identify diurnal patterns of dust loading, and diagnose issues with the dust retrievals over North Africa and Arabia. The original dust detection scheme falsely flags dust in regions of high 8.7μm emissivity. The implementation of an updated scheme mitigates this by making use of the mean 10.8-8.7μm brightness temperature difference in order to isolate airborne dust from rocky surfaces. Comparing the DAODs (at 550nm) retrieved using the different schemes with co-located AERONET observations, the impact is relatively small (RMS<0.02); however, these sites tend to be situated away from the regions where false detections are prevalent. For these regions, the application of the new scheme tends to provide a more consistent DAOD baseline for when the dust flag is triggered, important for the creation of a consistent data record. Turning to the DAODs themselves, RMS differences with the AERONET sites range from 0.19 to 0.46, but show a clear seasonal variation in the level of agreement, with higher biases in the boreal winter.
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影响因子:
5.5
作者:
A. Ipe;C. Bertrand;N. Clerbaux;S. Dewitte;L. Gonzalez
通讯作者:
L. Gonzalez
DOI:
10.1029/2000jd900150
发表时间:
2013
期刊:
The EGU General Assembly
影响因子:
--
作者:
N. C. Hsu;J. Herman;C. Weaver
通讯作者:
C. Weaver
影响因子:
13.5
作者:
C. Merchant;Owen Embury;P. Borgne;B. Bellec
通讯作者:
C. Merchant;Owen Embury;P. Borgne;B. Bellec
影响因子:
4.4
作者:
Ashpole, Ian;Washington, Richard
通讯作者:
Washington, Richard