Characteristic features of winter precipitation and its variability over northwest India

Yadav, Ramesh Kumar; Kumar, Krishan; Rajeevan, M.

doi:10.1007/s12040-012-0184-8

Cited by 80 publications

(47 citation statements)

References 11 publications

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“…The weakened Indian monsoon, strengthening El Niño, and westerlies, combined with the huge topographic landform, exert climatic controls on the distribution of existing glaciers along all Himalayan regions and reduce precipitation there. Archer and Fowler (2004) indicated that the western Hindu Kush and Karakoram are largely exposed to the arrival of westerly midlatitude perturbations bringing precipitation during winter and early spring, whereas the eastern Himalayas is dominated by summer monsoon precipitation (Syed et al, 2006;Yadav et al, 2012). Their results are similar to those of this study.…”

Section: Mass Change Of Glaciers In Himalayan Regionsupporting

confidence: 85%

Complex principal component analysis of mass balance changes on the Qinghai–Tibetan Plateau

Zhan

Wang

et al. 2017

The Cryosphere

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Abstract. Climatic time series for Qinghai-Tibetan Plateau locations are rare. Although glacier shrinkage is well described, the relationship between mass balance and climatic variation is less clear. We studied the effect of climate changes on mass balance by analyzing the complex principal components of mass changes during 2003-2015 using Gravity Recovery and Climate Experiment satellite data. Mass change in the eastern Himalayas, Karakoram, Pamirs, and northwestern India was most sensitive to variation in the first principal component, which explained 54 % of the change. Correlation analysis showed that the first principal component is related to the Indian monsoon and the correlation coefficient is 0.83. Mass change on the eastern Qinghai plateau, eastern Himalayas-Qiangtang Plateau-Pamirs area and northwestern India was most sensitive to variation of the second major factor, which explained 16 % of the variation. The second major component is associated with El Niño; the correlation coefficient was 0.30 and this exceeded the 95 % confidence interval of 0.17. Mass change on the western and northwestern Qinghai-Tibetan Plateau was most sensitive to the variation of its third major component, responsible for 6 % of mass balance change. The third component may be associated with climate change from the westerlies and La Niña. The third component and El Niño have similar signals of 6.5 year periods and opposite phases. We conclude that El Niño now has the second largest effect on mass balance change of this region, which differs from the traditional view that the westerlies are the second largest factor.

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Section: Mass Change Of Glaciers In Himalayan Regionsupporting

confidence: 85%

Complex principal component analysis of mass balance changes on the Qinghai–Tibetan Plateau

Zhan

Wang

et al. 2017

The Cryosphere

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“…This area is characterized by a variety of meteoclimatic regimes and by the interaction of local and large-scale circulation systems, resulting in a large variability of the spatial distribution of observed precipitation trends (e.g., Solomon et al 2007). Two main sub-regions, exposed to the influence of different circulation patterns, can be distinguished in the HKKH area: the western Hindu-Kush Karakoram (HKK) is largely exposed to the arrival of westerly midlatitude perturbations bringing precipitation during winter and early spring, while the eastern Himalaya is dominated by summer monsoon precipitation (Archer and Fowler 2004;Syed et al 2006;Yadav et al 2012). These different circulation patterns also influence glacier dynamics and, as a consequence, the hydrological regimes.…”

Section: Introductionmentioning

confidence: 99%

Precipitation in the Karakoram-Himalaya: a CMIP5 view

et al. 2014

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“…Winter precipitation in the WHR occurs under the influence of extratropical systems known as western disturbances (WDs) (Dimri and Dash, 2012;Yadav et al, 2012). These are the extratropical upper air troughs or cyclonic circulations (CCs) in midlatitude westerlies that move west to east across the Himalayan region Das 2002;Lang and Barros, 2004;Puranik and Karekar, 2009).…”

Section: Introductionmentioning

confidence: 99%

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

Kumar¹,

Yadav²,

Gahlot³

et al. 2015

Atmósfera

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RESUMENLos Himalayas desempeñan un papel importante en el clima y el tiempo meteorológico de la India, y controlan tanto las perturbaciones del oeste (PO) durante el invierno como el monzón del suroeste durante el verano. En los meses de invierno (diciembre a marzo), los vientos del oeste asociados con PO causan precipitaciones, en ocasiones asociadas a fuertes nevadas y extensas avalanchas sobre Himachal Pradesh. Por tal motivo, el presente estudio analiza la variabilidad temporal de la frecuencia de PO y de diversos índices de precipitación (como número de días húmedos y lluviosos, días con precipitación fuerte y muy fuerte, e intensidad de la precipitación de 1977 a 2007) en Himachal Pradesh durante el invierno. También se analizan las caracterís-ticas sinópticas asociadas con PO intensas que provocaron fuertes precipitaciones sobre la región durante el Himachal Pradesh ocurre sobre todo como resultado de las PO, tanto la precipitación total como los días con precipitación fuerte y muy fuerte han disminuido en la región. El análisis también muestra una disminución de alrededor de 25% en los días de precipitación fuerte y de 13% en la precipitación invernal total sobre Himachal Pradesh respecto de su media respectiva (de 1977 a 2007). ABSTRACTThe Himalayas have an important role in Indian weather and climate, since they control the western disturbances (WDs) during winter and the southwest monsoon during summer. During the winter months (December to March), westerly winds associated with WDs cause precipitation, sometimes along with heavy snowfall, extensive avalanches, etc., over Himachal Pradesh. Therefore, this study examined the temporal variability in the winter months frequency of WDs and various precipitation indices like wet days, rainy days, rather heavy and heavy precipitation days, and precipitation intensity during 1977 to 2007 over Himachal Pradesh. The study also examined synoptic features associated with intense WDs that caused heavy precipitation over the region trend in the frequency of WDs over this region. Since winter precipitation in Himachal Pradesh mainly occurs due to WDs, total winter precipitation and frequency of rather heavy and heavy precipitation days have decreased over the region. The analysis also shows a decrease of about 25% in heavy precipitation days and of 13% in total winter precipitation from their respective mean (from 1977 to 2007) over Himachal Pradesh.

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Characteristic features of winter precipitation and its variability over northwest India

Cited by 80 publications

References 11 publications

Complex principal component analysis of mass balance changes on the Qinghai–Tibetan Plateau

Complex principal component analysis of mass balance changes on the Qinghai–Tibetan Plateau

Precipitation in the Karakoram-Himalaya: a CMIP5 view

Winter frequency of western disturbances and precipitation indices over Himachal Pradesh, India: 1977-2007

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