Western disturbances vs Non-western disturbances days winter precipitation

Dimri, A. P.; Pooja, .; Jeelani, Ghulam; Mohanty, U. C.

doi:10.1007/s00382-023-06830-7

Cited by 4 publications

(11 citation statements)

References 79 publications

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“…Seascorr analysis between the chronology and precipitation and temperature data further confirmed that moisture stress (either due to low precipitation or induced by high temperature) limited tree growth. The climate of the northern Pakistan is primarily influenced by westerly winds during winter and spring 10 , 11 , 14 and present study area receives about 80% of its annual precipitation during the winter and spring months (Fig. 2 a), which is the ultimate source of moisture for plant growth.…”

Section: Discussionmentioning

confidence: 91%

“…This precipitation provides a moisture supply for tree growth during the spring and early summer months. During the late spring or early summer months, the temperature in the region increases very rapidly, which increases water demand for transpiration 38 , 41 , 57 Studies indicated weakening influence of western disturbance days precipitation in winter and spring season in the HKKH region during recent years 14 . If the area receives less precipitation during the winter and spring months and seasons, there is a water shortage for tree-growth during the growing season, which can lead to the formation of narrow rings during those years 38 , 41 .…”

Section: Discussionmentioning

confidence: 99%

“…Climate and their anomaly of the HKKH and adjacent regions is largely governed by prevailing local to regional general circulation systems in addition to the influence of climatic modes and phases like AMO, ENSO, PDO, and SOI of remote location 10 , 11 , 13 , 14 , 21 , 28 , 30 . However, preservation of the climatic signal, periodicity or spectral peak in tree-ring based climate reconstructions largely depend on method of detrending the raw tree ring data and type of chronology used for the reconstruction 37 , 73 .…”

Section: Discussionmentioning

confidence: 99%

“…The Hindu Kush Karakorum and Western Himalaya (HKKWH) has seasonality in its precipitation distribution, with a major contribution of westerlies (also known as western disturbance) during winter and spring seasons and a minor contribution of Indian summer monsoon during summer and to some extent by orographic precipitation 6 , 7 , 10 – 13 . Studies have shown a decreasing trend of western disturbance days precipitation and but increasing trend of non-western-disturbance days precipitation in the Himalaya region during recent years 14 Since HKKWH receives majority of the annual precipitation throughout winter and spring months, water availability during this season is crucial for multiple processes, including tree growth. Likewise, the discharge of perennial and ephemeral rivers found in the region is governed by this precipitation seasonality 3 , 7 , 15 , 16 .…”

Section: Introductionmentioning

confidence: 99%

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Multi-century (635-year) spring season precipitation reconstruction from northern Pakistan revealed increasing extremes

Khan,

Gaire,

Rahmonov

et al. 2024

Sci Rep

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The Hindu Kush Himalaya region is experiencing rapid climate change with adverse impacts in multiple sectors. To put recent climatic changes into a long-term context, here we reconstructed the region’s climate history using tree-ring width chronologies of climate-sensitive Cedrus deodara and Pinus gerardiana. Growth-climate analysis reveals that the species tree-growth is primarily limited by moisture stress during or preceding the growing season, as indicated by a positive relationship between the chronology and precipitation and scPDSI, and a negative one with temperature. We have reconstructed 635 years (1384–2018 CE) of February–June precipitation using a robust climate reconstruction model that explains about 53% variance of the measured precipitation data. Our reconstruction shows several dry and wet episodes over the reconstruction period along with an increase in extreme precipitation events during recent centuries or years. Long, very wet periods were observed during the following years: 1392–1393, 1430–1433, 1456–1461, 1523–1526, 1685–1690, 1715–1719, 1744–1748, 1763–1767, 1803–1806, 1843–1846, 1850–1855, 1874–1876, 1885–1887, 1907–1909, 1921–1925, 1939–1944, and 1990–1992, while long dry periods were observed during the following years: 1398–1399, 1464–1472, 1480–1484, 1645–1649, 1724–1727, 1782–1786, 1810–1814, 1831–1835, 1879–1881, 1912–1918, 1981–1986, 1998–2003, and 2016–2018 CE. We found predominantly short-term periodicity cycles of 2.0, 2.2, 2.3, 2.4, 2.6–2.7, 2.9, 3.3, 4.8, 8.1–8.3, and 9.4–9.6 years in our reconstruction. Spatial correlation analyses reveal that our reconstruction is an effective representation of the precipitation variability in the westerly climate-dominated areas of Pakistan and adjacent regions. In addition to the influence of regional circulation systems like western disturbances, we found possible teleconnections between the precipitation variability in northern Pakistan and broader-scale climate modes or phases like AMO and ENSO. The study also highlights the prospects of tree-ring application to explore linkages between western disturbance, increasing intensity and frequency of extreme climate events, and analysis of long-term atmospheric circulation over the western Himalayan region.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi-century (635-year) spring season precipitation reconstruction from northern Pakistan revealed increasing extremes

Khan,

Gaire,

Rahmonov

et al. 2024

Sci Rep

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“…Of particular interest, the Indian Ocean demonstrates the most pronounced rate of SST increase, followed by the AS and the BoB. The AS represents a pivotal moisture supplier for winter precipitation associated with WDs [29,60], while Dimri et al [61] have identified the BoB as a primary moisture contributor for non-WD-related winter precipitation over the WH. The rising SSTs, consequently, trigger enhanced evaporation processes, fostering the availability and transport of additional moisture, thereby substantially contributing to enhanced mean and extreme precipitation across the WH.…”

Section: Spatial Distribution Of Climatological Characteristics and T...mentioning

confidence: 99%

Delving into Recent Changes in Precipitation Patterns in the Western Himalayas under Global Warming

Saini¹,

Sharma²,

Attada³

2023

Global Warming - A Concerning Component of Climate Change [Working Title]

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Western Himalayas (WH) have experienced a two-fold temperature increase compared to the Indian sub-continent post-2000, strongly linked to global warming with significant implications for precipitation patterns. Using ERA5 reanalysis, we examine seasonal precipitation changes in the WH between recent (2001–2020) and past decades (1961–2000). Mean summer precipitation has increased over foothills but declined at higher elevations, while winter precipitation has increased region-wide except in certain parts of Jammu-Kashmir (JK), Uttarakhand (UK), and Punjab. In summer, light precipitation has increased in JK, while moderate precipitation has decreased over foothills but enhanced at higher altitudes. Moreover, extreme precipitation has significantly increased in the UK and Himachal Pradesh. During winter, light and extreme precipitation has increased, while moderate and heavy precipitation declined. Maximum one and five-day precipitation extremes (Rx1day, Rx5day) have increased in the foothills with more consecutive wet days. Winter extremes have increased in the northern region, while consecutive dry and wet days have declined, except for specific areas in eastern Ladakh and JK. Furthermore, rising sea surface temperatures, enhanced moisture transport, increased precipitable water and cloud cover in WH are associated with increasing mean and extreme precipitation, emphasizing the impacts of global warming on temperature and precipitation transitions in the region.

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Evaluating non-western disturbances winter precipitation over the western Himalayas

Pooja,

Dimri

2024

Clim Dyn

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Western disturbances vs Non-western disturbances days winter precipitation

Cited by 4 publications

References 79 publications

Multi-century (635-year) spring season precipitation reconstruction from northern Pakistan revealed increasing extremes

Multi-century (635-year) spring season precipitation reconstruction from northern Pakistan revealed increasing extremes

Delving into Recent Changes in Precipitation Patterns in the Western Himalayas under Global Warming

Evaluating non-western disturbances winter precipitation over the western Himalayas

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