Boreal spring precipitation variability in the cold arid western Himalaya during the last millennium, regional linkages, and socio-economic implications

Yadava, Akhilesh K.; Bräuning, Achim; Singh, Jayendra; Yadav, Ram R.

doi:10.1016/j.quascirev.2016.05.008

Cited by 49 publications

(63 citation statements)

References 65 publications

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“…Africa is also pointed out by IPCC as a continent where proxy-based climate reconstructions are currently too limited (Masson-Delmotte et al, 2013). Tree rings can be interpreted as historical records of climate signals (Schongart, Orthmann, Hennenberg, Porembski, & Worbes, 2006;Wils, 2009;Yadava, Br€ auning, Singh, & Yadav, 2016). As a result, it is timely to pursue possible alternatives to acquire evidence for pre-twentieth-century climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

Multi‐century tree‐ring precipitation record reveals increasing frequency of extreme dry events in the upper Blue Nile River catchment

Mokria

Gebrekirstos

Abiyu

et al. 2017

Global Change Biology

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Climate-related environmental and humanitarian crisis are important challenges in the Great Horn of Africa (GHA). In the absence of long-term past climate records in the region, tree-rings are valuable climate proxies, reflecting past climate variations and complementing climate records prior to the instrumental era. We established annually resolved multi-century tree-ring chronology from Juniperus procera trees in northern Ethiopia, the longest series yet for the GHA. The chronology correlates significantly with wet-season (r = .64, p < .01) and annual (r = .68, p < .01) regional rainfall. Reconstructed rainfall since A.D. 1811 revealed significant interannual variations between 2.2 and 3.8 year periodicity, with significant decadal and multidecadal variations during 1855-1900 and 1960-1990. The duration of negative and positive rainfall anomalies varied between 1-7 years and 1-8 years. Approximately 78.4% (95%) of reconstructed dry (extreme dry) and 85.4% (95%) of wet (extreme wet) events lasted for 1 year only and corresponded to historical records of famine and flooding, suggesting that future climate change studies should be both trend and extreme event focused. The average return periods for dry (extreme dry) and wet (extreme wet) events were 4.1 (8.8) years and 4.1 (9.5) years. Extreme-dry conditions during the 19th century were concurrent with drought episodes in equatorial eastern Africa that occurred at the end of the Little Ice Age. El Niño and La Niña events matched with 38.5% and 50% of extreme-dry and extreme-wet events. Equivalent matches for positive and negative Indian Ocean Dipole events were weaker, reaching 23.1 and 25%, respectively. Spatial correlations revealed that reconstructed rainfall represents wet-season rainfall variations over northern Ethiopia and large parts of the Sahel belt. The data presented are useful for backcasting climate and hydrological models and for developing regional strategic plans to manage scarce and contested water resources. Historical perspectives on long-term regional rainfall variability improve the interpretation of recent climate trends.

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Section: Introductionmentioning

confidence: 99%

Multi‐century tree‐ring precipitation record reveals increasing frequency of extreme dry events in the upper Blue Nile River catchment

Mokria

Gebrekirstos

Abiyu

et al. 2017

Global Change Biology

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“…The tree ring studies in India, barring a few on wood density (Hughes and Davies 1987;Hughes 1992Hughes , 2001Borgaonkar et al 2001) and stable isotopes (Ramesh et al 1985(Ramesh et al , 1986Managave et al 2011), are largely restricted to the application of ring-width chronologies Yadava et al 2016 and references therein) in climatic reconstructions. However, the potential to understand variations in climate during the growing season of trees using the intra-annual density fluctuations (IADFs) in annual rings has not yet been explored.…”

Section: Introductionmentioning

confidence: 99%

Climate control on ring width and intra-annual density fluctuations in Pinus kesiya growing in a sub-tropical forest of Manipur, Northeast India

Singh

Yadav²,

Venugopal

et al. 2016

Trees

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Key message Growth ring study of Pinus kesiya (khasi pine) growing in sub-tropical forest in Manipur, northeast India was performed to understand climate signatures in ring widths and intra-annual density fluctuations. Abstract The growth rings in khasi pine (Pinus kesiya Royle ex Gordon) growing in sub-tropical Reserve Forest in Imphal, Manipur, northeast India were analysed to understand environmental signals present in ring-width series and intra-annual density fluctuations (IADFs). For this the growth ring sequences in increment core samples collected from 28 trees were precisely dated and a ringwidth chronology spanning AD 1958-2014 developed. The correlation analyses between ring-width chronology and weather data of Imphal revealed that a cool AprilMay-June favour tree growth. The wood anatomical features of growth rings revealed the occurrence of IADFs in early-and latewoods. The IADFs in earlywood were found to be associated with reduced precipitation in months from April to July. However, the wetter conditions in late growing season, especially August/September triggered the formation of IADFs in latewood. Our findings endorse that the IADF chronologies of khasi pine could emerge as an important proxy of summer monsoon rainfall in long-term perspective in data scarce region of northeast India.

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“…5 ka is marked by overall dry climate with low spring precipitation(Chakraborty et al, 2006;Yadava et al, 2016). The MWP is known to be warmer (Ogilvie and Jónsson, 2001) than the LIA, which is marked by low temperature(Ogilvie and Jónsson, 2001;Yadav and Singh, 2002;Mann, 2002a).…”

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“…The MWP is known to be warmer (Ogilvie and Jónsson, 2001) than the LIA, which is marked by low temperature(Ogilvie and Jónsson, 2001;Yadav and Singh, 2002;Mann, 2002a). However, short pulses of moisture are reported during ~1.1-0.7 ka, and since last 0.2 ka, and are ascribed to the intensified ISM and enhanced westerlies(Chauhan et al, 2000; Kotlia and Joshi, 2013;Rawat et al, 2015;Yadava et al, 2016).Wasson et al (2013) observed an increase in the flood frequency in the Himalayas during MWP, which they attributed to intensification of the ISM.…”

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confidence: 99%

“…Panel (E) shows the westerlies strength inferred from the arid central Asian lakes(Chen et al, 2008). Panel (F) is the compiled climate data from the various lakes in the western(Chauhan et al, 2000; Chakraborty et al, 2006; Demske et al, 2009;Kotlia et al, 2010; Trivedi and Chauhan, 2009;Wünnemann et al, 2010;Mishra et al, 2015;Rawat et al, 2015;Yadava et al, 2016) and central Himalaya (Phadtare, 2000; Juyal et al, 2004; Sinha et al, 2005; Kotlia and Joshi, 2013). The wet and warm phases are represented by the dark blue region, while the light blue panels represent moderate climate.…”

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confidence: 99%

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The Holocene floods and their affinity to climatic variability in the western Himalaya, India

et al. 2017

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Boreal spring precipitation variability in the cold arid western Himalaya during the last millennium, regional linkages, and socio-economic implications

Cited by 49 publications

References 65 publications

Multi‐century tree‐ring precipitation record reveals increasing frequency of extreme dry events in the upper Blue Nile River catchment

Multi‐century tree‐ring precipitation record reveals increasing frequency of extreme dry events in the upper Blue Nile River catchment

Climate control on ring width and intra-annual density fluctuations in Pinus kesiya growing in a sub-tropical forest of Manipur, Northeast India

The Holocene floods and their affinity to climatic variability in the western Himalaya, India

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