Variation of Summer Water Vapor Transport Related to Precipitation over and around the Arid Region in the Interior of the Eurasian Continent

Yatagai, Akiyo; Yasunari, Tetsuzo

doi:10.2151/jmsj1965.76.5_799

Cited by 49 publications

(34 citation statements)

References 14 publications

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“…Summer monsoon flows bring large amount of water vapor to the monsoon area. Water vapor transport anomalies, and its divergence are closely related with the precipitation anomalies, and thus with droughts and floods in China (Huang et al 1998;Yatagai and Yasunari 1998). Tian and Yasunari (1998) showed that in northern spring the water vapor transport, associated with low-level southwesterlies to southern China, is responsible for the persistent rains over southern China.…”

Section: Introductionmentioning

confidence: 99%

Moisture Circulation over East Asia during El Nino Episode in Northern Winter, Spring and Autumn.

Zhang

Sumi

2002

Journal of the Meteorological Society of Japan

167

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Diagnostic analysis is made to investigate features of the moisture circulation over East Asian during the El Niñ o episode in northern winter, spring and autumn. It is found that in all these seasons, the anomalies of precipitation in China, atmospheric precipitable water, water vapor transport and moisture divergence over East Asia in the El Niñ o mature phase, differ from those in the rest of the phases. In the El Niñ o mature phase, positive precipitation anomalies occur in the southern part of China. More northeastward water vapor transport appears around the southeastern coast of East Asia, where moisture converges, and precipitable water is above normal, which are consistent with the precipitation anomalies. The physical process through which El Niñ o affects the East Asian climate, is also identified. Differing from the rest of the phases in the El Niñ o episode, the mature phase is characterized by strong convective cooling anomalies in the atmosphere, in the area (0-15 N, 110 E-150 E) over the western tropical Pacific. As a Rossby wave response of the tropical atmosphere to the cooling anomalies, an anomalous low-level anticyclone forms to the north of the maritime continent. This anticyclonic anomaly not only transports more water vapor to the area around the southeastern coast of East Asia, but also strengthens the western Pacific subtropical high, and shifts it to the south of the mainland China, which are favorable for more precipitation in the southern part of China.

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Section: Introductionmentioning

confidence: 99%

Moisture Circulation over East Asia during El Nino Episode in Northern Winter, Spring and Autumn.

Zhang

Sumi

2002

Journal of the Meteorological Society of Japan

167

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“…Because u, v, q, and p s are all functions of time, Q and Q are evaluated four times per day in the ERA15 data. This computational procedure is the same as that used in Yatagai and Yasunari (1998), which is basically the atmospheric water balance method (e.g. Peixoto and Oort, 1983).…”

Section: Dataset and Methodologymentioning

confidence: 99%

“…Over the Taklimakan Desert, little moisture arrives from the south because of the Tibetan Plateau. Yatagai and Yasunari (1998) found that Taklimakan sometimes received strong moisture from the south, but this is merely due to the region being defined differently. Here, we defined the subregion as being from 92Ð5°E to the west, which does not include moisture from the eastern Tibetan Plateau.…”

Section: Areal Averagesmentioning

confidence: 99%

“…They also investigated the relationship between the variations in those regions' summer precipitation and the variation of the Indian summer monsoon rainfall, and showed that each subregion had a variation that was apparently independent of the other subregions. Yatagai and Yasunari (1998) described how water vapour transport in the Taklimakan Desert is related to that region's precipitation; however, they did not compare the moisture budget with that of other regions. Moreover, the characteristics of the hydrological circulation in the western part of the Eurasian continent have not been compared with those in that of the eastern part.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of hydrological balance and its variability in arid and semi‐arid regions of Eurasia from ECMWF 15 year reanalysis

Yatagai

2003

Hydrological Processes

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Abstract:Hydrometeorological cycles over arid and semi-arid regions in mid-latitude Eurasia (the Silk Road region) were investigated using meteorological reanalysis data for the period 1979-93, available from the European Centre for Medium-range Weather Forecasts (ECMWF).Results show that seasonal changes of moisture balance in Turkey and central Asia, hereafter referred to as the western region, differ from those in the Taklimakan Desert and Loess Plateau, hereafter referred to as the eastern region. Here, we equate evaporation minus precipitation with the divergence field of the vertically integrated water vapour flux. In the western region, precipitation and positive convergence C of moisture primarily occurs during October-March. In contrast, the eastern region receives precipitation and has its positive C occurring during June-August. As a result, the eastern region has nearly simultaneous seasonal peaks in precipitation P and evapotranspiration E, whereas the western region has minimum P and maximum E in summer.The main annual moisture route for the Silk Road region is from the west to east; however, moisture also comes from the north in July. Over Turkey, moisture arrives from the west and south. In central Asia, however, most of the moisture comes from the west, the convergence peaks in March, and moisture from the south and west is also greater during this month. In the Loess Plateau, moisture enters from the west, the north, and the south, and exits to the east. In July, the peak precipitation and convergence season, all moisture flows are greater for the entire region, and a large influx of moisture from the south occurs during the summer season. The moisture from the south, the monsoonal flow, has a large interannual variability.

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“…The South Asian monsoon, carrying moisture from the Indian Ocean, dominates in summer; and the westerly circulations derived from the Mediterranean Sea and/or the Atlantic Ocean dominate in winter (Yatagai and Yasunari, 1998;Shi, 2002). This produces a distinct seasonal oscillation of the climate with warm-wet summers (MaySeptember) and cold-dry winters (October-April).…”

Section: Study Areamentioning

confidence: 99%

Last Glacial climate reconstruction by exploring glacier sensitivity to climate on the southeastern slope of the western Nyaiqentanglha Shan, Tibetan Plateau

Pan

Dong

et al. 2017

J. Glaciol.

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ABSTRACT. Improvements in understanding glacial extents and chronologies for the southeastern slope of the western Nyaiqentanglha Shan on the Tibetan Plateau are required to understand regional climate changes during the Last Glacial cycle. A two-dimensional numerical model of mass balance, based on snow-ice melting factors, and of ice flow for mountain glaciers is used to assess the glacier sensitivity to climatic change in a catchment of the region. The model can reproduce valley glaciers, widetongued glaciers and a coalescing glacier within step temperature lowering and precipitation increasing experiments. The model sensitivity experiments also indicate that the dependence of glacier growth on temperature and/or precipitation is nonlinear. The model results suggest that the valley glaciers respond more sensitively to an imposed climate change than wide-tongued and coalescing glaciers. Guided by field geological evidence of former glacier extent and other independent paleoclimate reconstructions, the model is also used to constrain the most realistic multi-year mean temperatures to be 2.9-4.6°C and 1.8-2.5°C lower than present in the glacial stages of the Last Glacial Maximum and middle marine oxygen isotope stage 3, respectively.

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Variation of Summer Water Vapor Transport Related to Precipitation over and around the Arid Region in the Interior of the Eurasian Continent

Cited by 49 publications

References 14 publications

Moisture Circulation over East Asia during El Nino Episode in Northern Winter, Spring and Autumn.

Moisture Circulation over East Asia during El Nino Episode in Northern Winter, Spring and Autumn.

Evaluation of hydrological balance and its variability in arid and semi‐arid regions of Eurasia from ECMWF 15 year reanalysis

Last Glacial climate reconstruction by exploring glacier sensitivity to climate on the southeastern slope of the western Nyaiqentanglha Shan, Tibetan Plateau

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