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DOI | 10.1175/JCLI-D-17-0592.1 |
A Climatology of Strong Large-Scale Ocean Evaporation Events. Part II: Relevance for the Deuterium Excess Signature of the Evaporation Flux | |
Aemisegger, Franziska1,2; Sjolte, Jesper3 | |
2018-09-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:18页码:7313-7336 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Switzerland |
英文摘要 | This paper discusses the relevance of transient events of strong large-scale ocean evaporation (SLOE) for the deuterium excess of marine boundary layer vapor d using a theoretical framework that invokes the closure assumption. We argue that during SLOE events, d is essentially determined by the evaporation flux signature. Distinct high d during SLOE with global-mean values in the range of 12 parts per thousand-23 parts per thousand depending on the nonequilibrium fractionation factor (k) result from the large air-sea humidity gradients reflected in low relative humidity with respect to sea surface temperature (h(s) = 53% +/- 9%) that characterize these events. Extratropical cyclones are highlighted as an important driver for the variability of d. On the one hand, they are themselves associated with high h(s) and low d, especially in areas of cloud formation and precipitation in the warm sector. On the other hand, cyclones are the main driver inducing SLOE events with high d in regions of cold-air advection upstream of their path. The sensitivity of d to its direct climate controls (h(s) and SST) is analyzed during SLOE for different (k) formulations and found to be coherent with d-h(s) and d-SST slopes determined from available observations. The d-h(s) relationship exhibits a robust negative correlation as opposed to the d-SST relationship, which shows regional and time-scale-dependent variations in strength and sign that are induced by indirect h(s)-SST cross-correlation effects. The dynamical features involved in SLOE generation appear to exert a key control on the moisture source properties relevant for d in the extratropics. |
英文关键词 | Extratropical cyclones Air-sea interaction Evaporation Water vapor |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440402800009 |
WOS关键词 | VAPOR ISOTOPIC COMPOSITION ; SURFACE-WATER-VAPOR ; BOUNDARY-LAYER ; RELATIVE-HUMIDITY ; HYDROGEN ISOTOPES ; ANTARCTIC SNOW ; ERA-INTERIM ; PRECIPITATION ; MOISTURE ; MODEL |
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/21078 |
专题 | 气候变化 |
作者单位 | 1.Lund Univ, Ctr Environm & Climate Res, Lund, Sweden; 2.Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Zurich, Switzerland; 3.Lund Univ, Dept Geol Quaternary Sci, Lund, Sweden |
推荐引用方式 GB/T 7714 | Aemisegger, Franziska,Sjolte, Jesper. A Climatology of Strong Large-Scale Ocean Evaporation Events. Part II: Relevance for the Deuterium Excess Signature of the Evaporation Flux[J]. JOURNAL OF CLIMATE,2018,31(18):7313-7336. |
APA | Aemisegger, Franziska,&Sjolte, Jesper.(2018).A Climatology of Strong Large-Scale Ocean Evaporation Events. Part II: Relevance for the Deuterium Excess Signature of the Evaporation Flux.JOURNAL OF CLIMATE,31(18),7313-7336. |
MLA | Aemisegger, Franziska,et al."A Climatology of Strong Large-Scale Ocean Evaporation Events. Part II: Relevance for the Deuterium Excess Signature of the Evaporation Flux".JOURNAL OF CLIMATE 31.18(2018):7313-7336. |
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