Understanding the linkage between soil moisture variability and temperature extremes over the Indian region

Ganeshi, Naresh; Mujumdar, Milind; Krishnan, R.; Goswami, Mangesh

doi:10.1016/j.jhydrol.2020.125183

Cited by 19 publications

(22 citation statements)

References 95 publications

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“…For example, MJO induced horizontal advection is shown to be dominant factor in Australian heatwave dynamics (Parker et al ., 2014a). However, studies on Indian heatwaves show important role of soil moisture (e.g., Ganeshi et al ., 2020) and MJO is shown to modulate soil moisture significantly (e.g., Peng et al ., 2017), which also can affect the heatwave dynamics, in conjunction with OLR. The positive OLR anomalies of ER are less than that of MJO, but peak over central India where heatwaves are maximum.…”

Section: Resultsmentioning

confidence: 99%

Effect of tropical sub‐seasonal variability on heatwaves over India

Zore

Landu

Gogoi

et al. 2020

Intl Journal of Climatology

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One of the important consequences of changing climate is the increase in temperature extremes and heat stress over many regions of the world. Understanding the various factors that modulate these events on different time scales is of utmost importance due to their great societal relevance. For example, understanding and prediction on sub-seasonal time scales is crucial for reducing losses due to extremes and diligent management of limited resources. In this

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Section: Resultsmentioning

confidence: 99%

Effect of tropical sub‐seasonal variability on heatwaves over India

Zore

Landu

Gogoi

et al. 2020

Intl Journal of Climatology

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“…In subtropical southwest China, soil moisture contributed 10%–50% of the total air temperature variance (J. Zhao et al, 2020). Over the monsoon‐dominated India region, the decrease in soil moisture increased the incidence of temperature extremes (Ganeshi et al, 2020). Correspondingly, our study also showed that the average maximum temperature variation caused by soil moisture change could reach 0.386 K in the whole study region during the summer from 2001 to 2018, explaining 57.99% of the total air temperature variance.…”

Section: Discussionmentioning

confidence: 99%

“…While in the subtropical southwest of China, soil moisture contributed 10%–50% of the total air temperature variance (J. Zhao et al, 2020). Over the monsoon‐dominated region of India, the long‐term decrease of soil moisture increased the incidence of temperature extremes (Ganeshi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Soil moisture influenced the variability of air temperature and oasis effect in a large inland basin of an arid region

Hao

Zhang

2021

Hydrological Processes

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Soil moisture plays a significant role in land‐atmosphere interactions. Changing fractions of latent and sensible heat fluxes caused by soil moisture variations can affect near‐surface air temperature, thus influencing the oasis's cooling effect in arid regions. In this study, the framework for the evaporative fraction (EF) dependence on soil moisture is used to analyse the impacts of soil moisture variation on near‐surface air temperature and the oasis effect. The result showed that soil moisture's contribution rate to EF was significantly higher than that of EF to temperature. Under the interaction of temperature sensitivity to EF and EF to soil moisture, the ∂T/∂ϴ presented a similar tempo‐spatial variation with both of the above. It was most significant in oasis areas during summer (−1.676), while it was weaker in plain desert areas during the autumn (−0.071). In the study region, the effect of soil moisture variation on air temperature can reach 0.018–0.242 K for different land‐cover types in summer. The maximum variation of soil moisture in summer can alter air temperature by up to 0.386 K. The difference in temperature variability between the oasis and desert areas promoted the formation of the oasis effect. For different oasis, the multi‐year average oasis cold effect index (OCI) ranged from −1.36 to −0.26 K. In comparison, the average summer OCI ranged from −1.38 to −0.29 K. The lower bound of the cooling effect of oasis ranged from −4.97 to −1.69 K. The analysis framework and results of this study will provide a new perspective for further research on the evolution process of the oasis effect and water–heat balance in arid areas.

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“…Surface and subsurface soil moisture also plays a crucial role in Earth's hydro-meteorological cycle at the land-atmosphere interface (no citation / e.g., selected one or two papers). Very limited high spatiotemporal surface and subsurface in situ soil moisture observations have been continuing, using sensor networks, a telemetric sensor network, and hydrological models over core South Asia (Bogena et al 2013;Foolad et al 2017;Srivastava et al 2015), where soil mositure variability is significantly complex due to strong coupling between soil moisture and surface temperature (Ganeshi et al 2020;. Monitoring sites of soil temperature and soil moisture were also established over the Tibetan Plateau to quantify uncertainties in satellite products and models (Su et al 2011).…”

Section: B Land-atmosphere Couplingmentioning

confidence: 99%

AsiaPEX: Challenges and Prospects in Asian Precipitation Research

Terao

Kanae

Fujinami

et al. 2023

Bulletin of the American Meteorological Society

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The Asian Precipitation Experiment (AsiaPEX) was initiated in 2019 to understand terrestrial precipitation over diverse hydroclimatological conditions for improved predictions, disaster reduction, and sustainable development across Asia under the framework of the Global Hydroclimatology Panel (GHP)/Global Energy and Water Exchanges (GEWEX). AsiaPEX is the successor to GEWEX Asian Monsoon Experiment (GAME, 1995-2005) and Monsoon Asian Hydro-Atmosphere Scientific Research and Prediction Initiative (MAHASRI, 2006-2016). While retaining the key objectives of the aforementioned projects, the scientific targets of AsiaPEX focus on land-atmosphere coupling and improvements to the predictability of the Asian hydroclimatological system. AsiaPEX was designed for both fine-scale hydroclimatological processes occurring at the land surface and the integrated Asian hydroclimatological system characterized by multiscale interactions. We adopt six approaches including observation, process studies, scale interactions, high-resolution hydrological modeling, field campaigns, and climate projection, which bridge gaps in research activities conducted in different regions. Collaboration with mesoscale and global modeling researchers is one of the core methods in AsiaPEX. We review these strategies based on the literature and our initial outcomes. These include the estimation and validation of high-resolution satellite precipitation, investigations of extreme rainfall mechanisms, field campaigns over the Maritime Continent and Tibetan Plateau, areas of significant impact on the entire AsiaPEX region, process studies on diurnal to interdecadal scale interactions, and evaluation of the predictabilities of climate models for long-term variabilities. We will conduct integrated observational and modeling initiative, the Asian Monsoon Year (AMY)-II around 2025-2028, whose strategies are the sub-regional observation platforms and integrated global analysis.

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Understanding the linkage between soil moisture variability and temperature extremes over the Indian region

Cited by 19 publications

References 95 publications

Effect of tropical sub‐seasonal variability on heatwaves over India

Effect of tropical sub‐seasonal variability on heatwaves over India

Soil moisture influenced the variability of air temperature and oasis effect in a large inland basin of an arid region

AsiaPEX: Challenges and Prospects in Asian Precipitation Research

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