Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026632 |
Physical processes controlling the spatial distributions of relative humidity in the tropical tropopause layer over the Pacific | |
Jensen, Eric J.1; Thornberry, Troy D.2,3; Rollins, Andrew W.2,3; Ueyama, Rei1; Pfister, Leonhard1; Bui, Theopaul1; Diskin, Glenn S.4; DiGangi, Joshua P.4; Hintsa, Eric3,5; Gao, Ru-Shan2; Woods, Sarah6; Lawson, R. Paul6; Pittman, Jasna7,8 | |
2017-06-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The spatial distribution of relative humidity with respect to ice (RHI) in the boreal wintertime tropical tropopause layer (TTL, similar or equal to 14-18km) over the Pacific is examined with the measurements provided by the NASA Airborne Tropical TRopopause EXperiment. We also compare the measured RHI distributions with results from a transport and microphysical model driven by meteorological analysis fields. Notable features in the distribution of RHI versus temperature and longitude include (1) the common occurrence of RHI values near ice saturation over the western Pacific in the lower to middle TTL; (2) low RHI values in the lower TTL over the central and eastern Pacific; (3) common occurrence of RHI values following a constant mixing ratio in the middle to upper TTL (temperatures between 190 and 200K); (4) RHI values typically near ice saturation in the coldest airmasses sampled; and (5) RHI values typically near 100% across the TTL temperature range in air parcels with ozone mixing ratios less than 50ppbv. We suggest that the typically saturated air in the lower TTL over the western Pacific is likely driven by a combination of the frequent occurrence of deep convection and the predominance of rising motion in this region. The nearly constant water vapor mixing ratios in the middle to upper TTL likely result from the combination of slow ascent (resulting in long residence times) and wave-driven temperature variability. The numerical simulations generally reproduce the observed RHI distribution features, and sensitivity tests further emphasize the strong influence of convective input and vertical motions on TTL relative humidity. |
英文关键词 | tropopause water vapor humidity cirrus |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131800034 |
WOS关键词 | STRATOSPHERIC WATER-VAPOR ; CIRRUS CLOUDS ; AIRCRAFT OBSERVATIONS ; UPPER TROPOSPHERE ; OZONE ; ICE ; DEHYDRATION ; TRANSPORT ; CALIBRATION ; HYGROMETER |
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/32418 |
专题 | 气候变化 |
作者单位 | 1.NASA, Ames Res Ctr, Atmospher Sci Branch, Moffett Field, CA 94035 USA; 2.NOAA, Earth Syst Res Lab, Chem Sci Div, Boulder, CO USA; 3.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO USA; 4.NASA, Langley Res Ctr, Chem & Dynam Branch, Hampton, VA 23665 USA; 5.NOAA, Earth Syst Res Lab, Global Monitoring Div, Boulder, CO USA; 6.SPEC Inc, Boulder, CO USA; 7.Northwest Res Assoc, Seattle, WA USA; 8.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Jensen, Eric J.,Thornberry, Troy D.,Rollins, Andrew W.,et al. Physical processes controlling the spatial distributions of relative humidity in the tropical tropopause layer over the Pacific[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(11). |
APA | Jensen, Eric J..,Thornberry, Troy D..,Rollins, Andrew W..,Ueyama, Rei.,Pfister, Leonhard.,...&Pittman, Jasna.(2017).Physical processes controlling the spatial distributions of relative humidity in the tropical tropopause layer over the Pacific.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(11). |
MLA | Jensen, Eric J.,et al."Physical processes controlling the spatial distributions of relative humidity in the tropical tropopause layer over the Pacific".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.11(2017). |
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