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DOI | 10.1002/2016JD025948 |
Ice water content-extinction relationships and effective diameter for TTL cirrus derived from in situ measurements during ATTREX 2014 | |
Thornberry, Troy D.1,2; Rollins, Andrew W.1,2; Avery, Melody A.3; Woods, Sarah4; Lawson, R. Paul4; Bui, Thaopaul V.5; Gao, Ru-Shan1 | |
2017-04-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The NASA Airborne Tropical Tropopause Experiment (ATTREX) deployment in January-March 2014 yielded more than 34h of cirrus cloud sampling in the tropical tropopause layer (TTL) over the western Pacific. Cirrus were encountered throughout the TTL, at temperatures between 185 and 207K, with ice water content (IWC) ranging from >10mgm(-3) to below the instrumental detection limit of 1gm(-3). Geometric optical extinction (sigma) values determined from cloud particle probe measurements ranged from 10(-3)m(-1) to <10(-7)m(-1). The median effective diameter (D-eff) for cirrus sampled at T>192K was 40-50m and exhibited a weak temperature dependence, while colder than 192K, D-eff decreased more strongly with decreasing T. From the ATTREX data, a new parameterization of the IWC-sigma relationship for TTL cirrus is derived that will improve the estimation of IWC from lidar and optical probe observations of these clouds. Plain Language Summary Cold, high-altitude tropical cirrus clouds are an important component of the climate system but are significantly underconstrained in climate models. Lidar measurements, especially from satellites, have the spatial and temporal coverage to produce statistically meaningful observations for model comparison and validation but do not directly measure quantities such as cloud ice water content that are important predicted quantities in the models. We have used an extensive data set of cloud ice water content and microphysical properties collected during a 2014 aircraft campaign in the western Pacific to derive a new parameterization that will improve the estimation of ice water content from lidar remote sensing measurements of tropical cirrus. With this parameterization, lidar observations can be used to derive a more accurate ice water content for tropical cirrus, in order to improve its treatment in models. |
英文关键词 | cirrus TTL ice water content |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401180800021 |
WOS关键词 | SINGLE-SCATTERING PROPERTIES ; TROPICAL TROPOPAUSE LAYER ; ALGORITHM DESCRIPTION ; EFFECTIVE RADIUS ; HIGH-SPEED ; PART I ; CRYSTALS ; CLOUDS ; PROBE ; LIDAR |
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/32942 |
专题 | 气候变化 |
作者单位 | 1.NOAA, Div Chem Sci, Earth Syst Res Lab, Boulder, CO 80305 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.NASA, Langley Res Ctr, Atmospher Composit Branch, Hampton, VA 23665 USA; 4.SPEC Inc, Boulder, CO USA; 5.NASA, Ames Res Ctr, Atmospher Sci Branch, Moffett Field, CA 94035 USA |
推荐引用方式 GB/T 7714 | Thornberry, Troy D.,Rollins, Andrew W.,Avery, Melody A.,et al. Ice water content-extinction relationships and effective diameter for TTL cirrus derived from in situ measurements during ATTREX 2014[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(8). |
APA | Thornberry, Troy D..,Rollins, Andrew W..,Avery, Melody A..,Woods, Sarah.,Lawson, R. Paul.,...&Gao, Ru-Shan.(2017).Ice water content-extinction relationships and effective diameter for TTL cirrus derived from in situ measurements during ATTREX 2014.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(8). |
MLA | Thornberry, Troy D.,et al."Ice water content-extinction relationships and effective diameter for TTL cirrus derived from in situ measurements during ATTREX 2014".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.8(2017). |
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