Retrieval of aerosol optical depth over land surfaces from AVHRR data
Retrieval of aerosol optical depth over land surfaces from AVHRR data
复制标题
从 AVHRR 数据反演陆地表面气溶胶光学深度
DOI：
10.5194/amt-7-2411-2014
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发表时间：
2013-02
影响因子：
3.8
通讯作者：
Burrows J.P.
中科院分区：
文献类型：
--
作者：
Kokhanovsky A. A.;von Hoyningen-Huene W.;de Leeuw G.;Burrows J.P.
抽象的。先进的甚高分辨率辐射计(AVHRR)提供了几个波段的全球、长期、一致的辐射数据序列，用于反演地表光谱反射率、反照率和地表温度。这类数据产品的长期时间序列对于研究气候变化、海冰分布和运动以及冰盖沿海形态是必要的。AVHRR辐射还被用来反演海洋和陆地表面的气溶胶特性。然而，由于数据中的信息含量有限，使得反演问题不明确，因此陆地上气溶胶的反演是具有挑战性的。求解辐射传递方程需要额外的信息来减少未知数。在这一贡献中，我们利用了波长为3.75μm和2.1μm的AVHRR通道的表面反射率之间的经验线性关系，这一关系已在中分辨率成像光谱仪数据中得到证实。在MODIS暗靶方法的基础上，利用该关系得到了0.64μm的地表反射率，并将估算的地表反射率与MOD09的反射率产品进行了比较，结果表明两者具有很强的相关性。一旦确定了这一点，MODIS“暗目标”气溶胶反演方法就适用于AVHRR数据。检索中采用了简化的查找表(LUT)方法，该方法取自不来梅气溶胶检索(BAER)算法。用该方法反演的气溶胶光学厚度与地面测量结果相比较，71.8%的点位于同一线的±(0.1+0.15τ)(τ为气溶胶光学厚度)以内。这种方法可以很容易地应用于其他没有2.1μm通道的卫星仪器，例如目前计划用于地球静止卫星的那些卫星仪器。
Abstract. The Advanced Very High Resolution Radiometer (AVHRR) provides a global, long-term, consistent time series of radiance data in several wavebands which are used for the retrieval of surface spectral reflectance, albedo and surface temperature. Long-term time series of such data products are necessary for studies addressing climate change, sea ice distribution and movement, and ice sheet coastal configuration. AVHRR radiances have also been used to retrieve aerosol properties over ocean and land surfaces. However, the retrieval of aerosol over land is challenging because of the limited information content in the data which renders the inversion problem ill defined. Solving the radiative transfer equations requires additional information to reduce the number of unknowns. In this contribution we utilise an empirical linear relationship between the surface reflectances in the AVHRR channels at wavelengths of 3.75 μm and 2.1 μm, which has been identified in the Moderate Resolution Imaging Spectroradiometer (MODIS) data. Following the MODIS dark target approach, this relationship is used to obtain the surface reflectance at 0.64 μm. The comparison of the estimated surface reflectances with MODIS reflectance products (MOD09) shows a strong correlation. Once this was established, the MODIS "dark-target" aerosol retrieval method was adapted to AVHRR data. A simplified look-up table (LUT) method, adopted from the Bremen AErosol Retrieval (BAER) algorithm, was used in the retrieval. The aerosol optical depth (AOD) values retrieved from AVHRR with this method compare favourably with ground-based measurements, with 71.8% of the points located within ±(0.1 + 0.15τ) (τ is the AOD) of the identity line. This method can be easily applied to other satellite instruments which do not have a 2.1 μm channel, such as those currently planned to be used on geostationary satellites.
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影响因子：
--
作者：
W. V. Hoyningen-Huene;M. Freitag;J. Burrows
通讯作者：
W. V. Hoyningen-Huene;M. Freitag;J. Burrows
DOI：
10.1007/978-3-540-69397-0_8
发表时间：
2009
期刊：
--
影响因子：
--
作者：
T. Holzer-Popp;M. Schroedter-Homscheidt;Hanne-Katarin Breitkreuz;D. Martynenko;L. Klüser
通讯作者：
T. Holzer-Popp;M. Schroedter-Homscheidt;Hanne-Katarin Breitkreuz;D. Martynenko;L. Klüser
影响因子：
1.9
作者：
C. Fröhlich;Glenn E. Shaw
通讯作者：
C. Fröhlich;Glenn E. Shaw
影响因子：
3.4
作者：
Yong Xue;A. Cracknell
通讯作者：
Yong Xue;A. Cracknell
DOI：
10.1007/978-3-540-69397-0_5
发表时间：
2009
期刊：
--
影响因子：
--
作者：
L. Curier;G. Leeuw;P. Kolmonen;A. Sundström;L. Sogacheva;Y. Bennouna
通讯作者：
L. Curier;G. Leeuw;P. Kolmonen;A. Sundström;L. Sogacheva;Y. Bennouna