Abstract Significant increase in the frequency of occurrences rainfall extremes has been reported over several parts world. These extreme events were defined at individual grids without considering their spatial extent. Here, using ground-based observations India during boreal summer, we show that average size spatially collocated significantly increasing since 1980. However, such remains unchanged. Around 90% total number large-sized (area ≥ 70 × 10 3 km 2 ) our study period (1951 to 2015)...

Abstract In recent years India has been increasingly experiencing widespread floods induced by large‐scale extreme rainfall events (LEREs). LEREs are mainly associated with monsoon low‐pressure systems (LPS). The forecast of these high‐flood‐potential events, however, remained challenging. Here, we compare LPSs the summer that led to (LPS‐Lg) and strong did not result in (LPS‐noLg) over central for period 1979–2012. We show having a LPS is sufficient condition produce LEREs, LPS‐Lgs...

Extreme scenarios of global warming out to 2300 from the SSP5-8.5 extension scenario are analyzed in three state-of-the-art climate models, including two models with sensitivity greater than 4.5°C. The result is some largest amounts ever seen simulations run over historical record and into future. exhibit between 9.3 17.5°C mean temperature change pre-Industrial end 23rd century. extremely large changes allow exploration fundamental questions dynamics, such as determination moisture energy...

Abstract We examine tropical rainfall from the Geophysical Fluid Dynamics Laboratory's Atmosphere Model version 4 (GFDL AM4) at three horizontal resolutions of 100 km, 50 and 25 km. The model produces more intense finer resolutions, but a large discrepancy still exists between simulated observed frequency distribution. use theoretical precipitation scaling diagnostic to distribution rainfall. accurately moderate‐to‐high intensity (≥10 mm day −1 ). Intense is produced primarily increased...

Abstract Large-scale extreme rainfall events (LEREs) over central India are produced by monsoon low pressure systems (LPSs) when assisted a secondary cyclonic vortex (SCV). Both the LPS and SCV embedded in trough form mainly during positive phase of boreal summer intraseasonal oscillation. Here, we observe that tropical–extratropical interactions exist LEREs. Using ray tracing, show extratropical Rossby waves propagate to Indian subcontinent season. Stationary wave rays originating North...

In recent years India has been increasingly experiencing widespread floods induced by large-scale Extreme Rainfall Events (LEREs). LEREs are mainly associated with monsoon Low-Pressure Systems (LPS). The forecast of these high-flood-potential events, however, remained challenging. Here, we compare LPSs the summer that led to (LPS-Lg) and strong did not result in (LPS-noLg) over central for period 1979-2012. We show having a LPS is sufficient condition produce LEREs, LPS-Lg accompanied...

Abstract The sub-seasonal and synoptic-scale variability of the Indian summer monsoon rainfall are controlled primarily by intra-seasonal oscillations (MISO) low pressure systems (LPS), respectively. positive negative phases MISO lead to alternate epochs above-normal (active) below-normal (break) spells rainfall. LPSs embedded within different known produce heavy precipitation events over central India. Whether interaction with modulates response LPSs, thereby characteristics extreme (EREs)...

Large-scale extreme rainfall events (LEREs) over central India are produced by monsoon low-pressure systems (LPSs) when assisted a secondary cyclonic vortex (SCV).Both the LPS and SCV embedded in trough form mainly during positive phase of boreal summer intraseasonal oscillation.Here, we observe that tropical-extratropical interactions exist LEREs.Using ray tracing, show extratropical Rossby waves propagate to Indian subcontinent season.Stationary wave rays originating north Atlantic ocean...

We examine tropical rainfall from Geophysical Fluid Dynamics Laboratory’s Atmosphere Model version 4 (GFDL AM4) at three horizontal resolutions of 100 km, 50 and 25 km. The model produces more intense finer resolutions, but a large discrepancy still exists between the simulated observed frequency distribution. use theoretical precipitation scaling diagnostic to distribution rainfall. accurately moderate-to-high intensity (≥10 mm day-1). Intense is produced primarily increased contribution...

We examine tropical rainfall from Geophysical Fluid Dynamics Laboratory’s Atmosphere Model version 4 (GFDL AM4) at three horizontal resolutions of 100 km, 50 and 25 km. The model produces more intense finer resolutions, but a large discrepancy still exists between the simulated observed frequency distribution. use theoretical precipitation scaling diagnostic to distribution rainfall. accurately moderate-to-high intensity (≥10 mm day −1). Intense is produced primarily increased contribution...

Changing characteristics of precipitation extremes have been reported mainly using parameters like the frequency occurrence and magnitude. As climate changes, spatio-temporal rainfall are also likely to get modified. Though there exist studies noting changing temporal distribution, spatial extent extreme events has received less attention. We show that 31% fractional increase in number Indian summer monsoon from 1951 2015 is size-change related. find average size significantly increasing...

Earth and Space Science Open Archive PosterOpen AccessYou are viewing the latest version by default [v1]On interaction of multiple monsoon lows that produce large-scale heavy rainfallAuthorsAkshayaNikumbhiDArindamChakrabortyiDG. S.BhatDarganFriersonSee all authors Akshaya NikumbhiDCorresponding Author• Submitting AuthorIndian Institute ScienceiDhttps://orcid.org/0000-0001-5606-8571view email addressThe was not providedcopy addressArindam ChakrabortyiDIndian...