The Siberian High and climate change over middle to high latitude Asia

Gong, D.; Ho, Chin Siong

doi:10.1007/s007040200008

Cited by 337 publications

(205 citation statements)

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“…Decreases in the strength of the regional circulation system of the Asian monsoons (Chase et al, 2003;Gong and Ho, 2002;Kripalani et al, 2002) which may lead to the observed reductions in wind speed on the TP could be responsible for observed lower PET rates in recent years. This is in contrast to predicted increased monsoonal activity and an increased hydrological cycle under global warming scenarios (IPCC, 2001).…”

Section: Resultsmentioning

confidence: 99%

Climatic change on the Tibetan Plateau: Potential Evapotranspiration Trends from 1961–2000

2006

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Abstract. Time series of Penman-Monteith potential evapotranspiration estimates for 101 stations on the Tibetan Plateau and surrounding areas are analyzed in this paper. For the Tibetan Plateau as a whole potential evapotranspiration (PET) has decreased in all seasons. The average annual evapotranspiration rate decreased by 13.1 mm/decade or 2.0% of the annual total. Superimposed on this general decline are fluctuations ranging from app. 600 to 700 mm with above average rates in the 1970s and 1980s. On a regional basis, spatial trend distributions remain stable throughout the year with similar seasonal variations. Decreasing PET rates are more pronounced in winter and spring (80% of all stations) as compared to summer and autumn (58% of all stations). Maximum negative (positive) annual rates were recorded at two stations in the southern Qaidam Basin with −79.5 mm/decade (84.8 mm/decade) even though in general negative rates tend to be noticeably higher than positive rates.Changes in wind speed and to a lesser degree relative humidity were found to be the most important meteorological variables affecting PET trends on the Tibetan Plateau while changes in sunshine duration played an insignificant role. Stable daytime temperatures on the Tibetan Plateau have limited the importance of temperature trends for changes of PET rates. Negative evapotranspiration trends are therefore thought to be linked to a general decrease in intensity of the regional monsoon circulation rather than to reductions in sunshine duration. Reduced PET rates appear to be in contrast to a predicted increased hydrological cycle under global warming scenarios.

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Section: Resultsmentioning

confidence: 99%

Climatic change on the Tibetan Plateau: Potential Evapotranspiration Trends from 1961–2000

2006

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“…A study of cloud cover over the former Soviet Union found decreasing low-level clouds of mostly stratiform type but increasing total cloud cover during the study period of 1936-1990(Sun and Groisman, 2000. Studies of the intensity of the SBH found a weakening trend that is negatively correlated with surface air temperature during recent decades (Gong and Ho, 2004;Panagiotopoulos et al, 2005). This implies that the warming climate over Siberia may be partially associated with the weakening of the SBH, and thus, a reduction in the stability of the Arctic atmosphere and in low stratiform cloud frequency.…”

Section: Introductionmentioning

confidence: 94%

The influence of air temperature and atmospheric circulation on winter fog frequency over Northern Eurasia

2008

Intl Journal of Climatology

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This study examines the relationship between the number of fog days with surface air temperature and with atmospheric circulation as represented by the Arctic Oscillation (AO) and Siberian High (SBH) Pressure index over northern Eurasia during the winters of 1936-1937 to 1989-1990. The results suggest that the number of fog days decreases as surface air temperature increases, the SBH weakens, and the AO strengthens over much of the study region, except for southern European Russia, where fog days may increase with air temperature. The most significant and dominant impact on fog day frequency is surface air temperature, followed by the intensity of the SBH which directly reflects atmospheric stability. The AO has some limited influence on fog frequency over northern European Russia and southwestern Siberia. The combination of air temperature with either SBH or AO index explained, on average, about 30-60% of the variability of winter fog days over Siberia.

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“…As discussed earlier, the El Niño Southern Oscillation (ENSO), Arctic Oscillation (AO), Siberian High (SH), and Eurasian/ Polar Pattern (EP) are among the dominant modes of climate variability, with time scales ranging from months to years, which have been related to climatic impacts in Asia (Cohen and Entekhabi 1999;Wu and Wang 2002a, b;Gong and Ho 2002). Thus, investigating these modes is essential to understanding the interannual-to-decadal variability of Himalayan climate.…”

Section: Teleconnectionsmentioning

confidence: 99%

Multi-annual variations in winter westerly disturbance activity affecting the Himalaya

et al. 2014

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The Siberian High and climate change over middle to high latitude Asia

Cited by 337 publications

References 0 publications

Climatic change on the Tibetan Plateau: Potential Evapotranspiration Trends from 1961–2000

Climatic change on the Tibetan Plateau: Potential Evapotranspiration Trends from 1961–2000

The influence of air temperature and atmospheric circulation on winter fog frequency over Northern Eurasia

Multi-annual variations in winter westerly disturbance activity affecting the Himalaya

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