Spring northward retreat of Eurasian snow cover relevant to seasonal and interannual variations of atmospheric circulation

Ueda, Hiroaki; Shinoda, Masato; Kamahori, Hirotaka

doi:10.1002/joc.903

Cited by 31 publications

(35 citation statements)

References 24 publications

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“…Advection from southwest shows often features of foehn as well; it is observed in southern Poland in about 12 % days in December and January (Niedźwiedź 2003). A similar influence is observed over east European Plain, where the warm air associated with southwesterly winds and the adiabatic heating of descending air are primarily responsible for the rapid snowmelt in March and April (Ueda et al 2003). The foehn effect influence on the snow cover stability in Poland appears to be much stronger and visible on far larger surface than this one on snow cover duration and snow cover depth analyzed before (Falarz 2007a).…”

Section: Discussionsupporting

confidence: 60%

“…However, the impact of circulation changes on the stability of the snow cover in the course of the winter season is less known. Some works studied the influence of atmospheric circulation on midwinter (Grundstein and Leathers 1998) or spring melting snow cover (Ueda et al 2003). Some papers present models of snow cover-atmospheric boundary layer interactions (Strack et al 2003;Rodell and Houser 2004).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal stability of snow cover in Poland in relation to the atmospheric circulation

Falarz

2012

Theor Appl Climatol

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The seasonal stability of snow cover (ISS) was defined as a percentage ratio of the real and the potential snow cover duration in a winter season. Main results of the study are as follows: (1) alternately occurring periods of high and low values of the index of snow cover stability did not appeared simultaneously in mountainous and nonmountainous areas; (2) in the majority of Poland area both zonal and meridional components of the atmospheric circulation influence the ISS; however, in south the meridional air flow reveals the stronger impact, mostly due to the intensification of the southern advection by the foehn effect; and (3) changes of two or three indices describing atmospheric circulation explain up to 50 % of the ISS in Poland. The diminishing stability of snow cover in Poland corresponds with an increasing intensity of the advection from the western sector in winter in the second half of the twentieth century in Europe.

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Section: Discussionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Seasonal stability of snow cover in Poland in relation to the atmospheric circulation

Falarz

2012

Theor Appl Climatol

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“…In the years of excessive ESSC anomalies, cooling and a cyclonic circulation anomaly in the lower troposphere appeared over the northern part of Eurasia, which weakened east Asia summer monsoon and caused deficient rainfall. By observational studies, Ueda et al (2003) confirmed the earlier findings that the surface temperature decreased in May (usually the seasonal snow-disappearance period) and that there is a weak dynamical linkage between the east European plain snow cover from 30 to 60°E and Asian summer monsoon.…”

Section: Introductionsupporting

confidence: 85%

A study on the effect of Eurasian snow on the summer monsoon circulation and rainfall using a spectral GCM

2006

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Many studies based on observed data indicate the inverse relationship between the Eurasian snow cover/depth and the Indian summer monsoon rainfall (ISMR). The purpose of this study is to confirm the inverse snow-ISMR relationship by using the observed snow depth data as boundary conditions in the spectral general circulation model (GCM) of Indian Institute of Technology, Delhi (IITD), and to examine the influence of Eurasian snow depth on the monsoon circulation. The original model belonging to the European Centre for Medium range Weather Forecasts (ECMWF) at resolution T21 has been modified extensively to a higher resolution of T80L18 at IITD. A two-dimensional Lanczos digital filter has been used to represent the orography realistically.The Historical Soviet Daily Snow Depth (HSDSD) version II data set has been used for conducting sensitivity experiments using the above model. Two sensitivity experiments have been designed, corresponding to two contrasting cases: one with high Eurasian snow depth in spring followed by deficient ISMR and the second with low snow depth followed by excess ISMR. The difference fields of mean monsoon circulation simulated in the above two experiments are examined in detail in order to confirm the influence of Eurasian snow depth on ISMR and to examine the Asian summer monsoon circulation and rainfall.

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“…Q is referred to as the apparent heat source because of possible contributions resulting from unresolved eddies associated with dry thermal convection (Yanai et al 1973;Ueda et al 2003). The lower atmospheric heat budget is calculated for the domain shown in Fig.…”

Section: Snowmelt and Atmospheric Heating Processes Over Eastern Mongmentioning

confidence: 99%

“…It is well known that there is a negative correlation between the winter snow cover over the continent and the subsequent Asian summer monsoon, as pointed out for the first time by Blanford (1884). Since then, considerable evidence of such correlation has been accumulated from analyses of satellite-observed snow data (e.g., Hahn and Shukla 1976) and ground-based snow data (e.g., Shinoda 2001;Shinoda et al 2001;Ueda et al 2003) and numerical simulations (e.g., Barnett et al 1989). On the other hand, there have been a few attempts to explore the physical processes that cause snowmelt on the continent (Ueda et al 2003;Iijima et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Snowmelt and Atmospheric Heating Processes over Eastern Mongolia

Komatsu

Shinoda

Ueda

2011

SOLA

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A shallow snowpack, such as that seen in Mongolia, easily melts through heating by the atmosphere. In turn, a snow-free surface without much meltwater heats the atmosphere quickly through heat fluxes at the surface. The present study investigated the snowmelt processes over eastern Mongolia during 2005−2007, using ground-observed temperature, snow depth, albedo, and radiation data. Moreover, we explored atmospheric influences on the snowmelt through the heat budget analysis of reanalysis data provided by the National Centers for Environmental Prediction.The results show that atmospheric heating over eastern Mongolia during the snowmelt season is caused by the combination of vertical adiabatic heating in a traveling anticyclone and one-daylagging horizontal advection after the passage of the anticyclone. These synoptic processes lead to a drastic increase in temperature and finally to substantial snowmelt under certain atmospheric conditions: the daily-mean surface air temperature exceeding −10°C and downward longwave radiation exceeding 194 W m −2 under clear sky conditions.

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Spring northward retreat of Eurasian snow cover relevant to seasonal and interannual variations of atmospheric circulation

Cited by 31 publications

References 24 publications

Seasonal stability of snow cover in Poland in relation to the atmospheric circulation

Seasonal stability of snow cover in Poland in relation to the atmospheric circulation

A study on the effect of Eurasian snow on the summer monsoon circulation and rainfall using a spectral GCM

Snowmelt and Atmospheric Heating Processes over Eastern Mongolia

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