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DOI | 10.1029/2018JD028558 |
Uncertainties in MODIS-Based Cloud Liquid Water Path Retrievals at High Latitudes Due to Mixed-Phase Clouds and Cloud Top Height Inhomogeneity | |
Khanal, Sujan1; Wang, Zhien1,2,3 | |
2018-10-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:19页码:11154-11172 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Combined A-train remote sensing measurements from Moderate Resolution Imaging Spectroradiometer (MODIS), Advanced Microwave Scanning Radiometer for Earth Observing System (AMSR-E), CloudSat, and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) are used to study MODIS liquid water path (LWP) uncertainties at high latitudes. The focus is on quantifying uncertainties due to mixed-phase clouds and solar zenith angle-dependent bias, both of which disproportionately affect the MODIS data set in the polar regions. Multisensor LWP retrievals in stratiform mixed-phase clouds show that treating mixed-phase clouds as liquid clouds result in LWP bias that is related to the ice water path (IWP) on average and reaches close to 15% at IWP of 150 g/m(2) and can reach 40% or higher when IWP is greater than 400 g/m(2). Moreover, A-train measurements and radiative transfer modeling are used to further understand the well-known yet unresolved solar zenith angle-dependent high bias in MODIS LWP. It is shown that the cloud top height variation is one of the main factors that contribute to this bias due to three-dimensional radiative interactions with cloud top inhomogeneity. Excluding only 0.5% of data points that show significant three-dimensional errors reduces the bias by 25 g/m(2) at solar zenith angle of 80 degrees and improves agreement with the AMSR-E LWP trends. Three-dimensional radiative transfer simulations confirm that cloud top inhomogeneity is primarily responsible for the solar zenith angle-dependent LWP bias as observed by the MODIS measurements. This study provides a framework to guide future improvements of MODIS LWP data set, which is a key data source to constrain climate models. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448374800022 |
WOS关键词 | BOUNDARY-LAYER CLOUDS ; OPTICAL DEPTH ; ARCTIC CLOUD ; SATELLITE-OBSERVATIONS ; RADIATIVE PROPERTIES ; ICE CONCENTRATION ; SOLAR-RADIATION ; SOUTHERN-OCEAN ; A-TRAIN ; CLIMATE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32909 |
专题 | 气候变化 |
作者单位 | 1.Univ Wyoming, Dept Atmospher Sci, Laramie, WY 82071 USA; 2.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA; 3.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Khanal, Sujan,Wang, Zhien. Uncertainties in MODIS-Based Cloud Liquid Water Path Retrievals at High Latitudes Due to Mixed-Phase Clouds and Cloud Top Height Inhomogeneity[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(19):11154-11172. |
APA | Khanal, Sujan,&Wang, Zhien.(2018).Uncertainties in MODIS-Based Cloud Liquid Water Path Retrievals at High Latitudes Due to Mixed-Phase Clouds and Cloud Top Height Inhomogeneity.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(19),11154-11172. |
MLA | Khanal, Sujan,et al."Uncertainties in MODIS-Based Cloud Liquid Water Path Retrievals at High Latitudes Due to Mixed-Phase Clouds and Cloud Top Height Inhomogeneity".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.19(2018):11154-11172. |
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