Recent progress on the sources of continental precipitation as revealed by moisture transport analysis

Gimeno, Luis; Vázquez, M.; Eiras‐Barca, Jorge; Sorí, Rogert; Stojanović, Milica; Algarra, Iago; Ramos, Alexandre M.; Durán-Quesada, Ana María; Domínguez, Francina

doi:10.1016/j.earscirev.2019.103070

Cited by 93 publications

(74 citation statements)

References 301 publications

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“…To identify the main SAT moisture sinks, the Lagrangian approach developed by Stohl and James [30,31] using the FLEXPART model was applied. This methodology has been widely used with this purpose during recent decades [32][33][34][35][36]. In comparison with the Eulerian approaches, the Lagrangian methodology enables the tracking of air parcels, allowing the establishment of moisture source-receptor relationships in a more realistic way [36].…”

Section: Definition Of the Lagrangian Approach For The Moisture Transmentioning

confidence: 99%

“…This methodology has been widely used with this purpose during recent decades [32][33][34][35][36]. In comparison with the Eulerian approaches, the Lagrangian methodology enables the tracking of air parcels, allowing the establishment of moisture source-receptor relationships in a more realistic way [36]. In the FLEXPART simulation, the global atmosphere was divided homogeneously into nearly 2.0 million particles with constant mass transported using 3D wind fields from the global reanalysis data ERA-Interim.…”

Section: Definition Of the Lagrangian Approach For The Moisture Transmentioning

confidence: 99%

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Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index

et al. 2021

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A large part of the population and the economic activities of South America are located in eastern regions of the continent, where extreme climate events are a recurrent phenomenon. This study identifies and characterizes the dry and wet climate periods at domain-scale occurring over the eastern South America (ESA) during 1980–2018 through the multi-scalar Standardized Precipitation–Evapotranspiration Index (SPEI). For this study, the spatial extent of ESA was defined according to a Lagrangian approach for moisture analysis. It consists of the major continental sink of the moisture transported from the South Atlantic Ocean throughout the year, comprising the Amazonia, central Brazil, and the southeastern continental areas. The SPEI for 1, 3, 6, and 12 months of accumulation was calculated using monthly precipitation and potential evapotranspiration time series averaged on ESA. The analysis of the climate periods followed two different approaches: classification of the monthly SPEI values as mild, moderate, severe, and extreme; the computation of the events and their respective parameters (duration, severity, intensity, and peak). The results indicate that wet periods prevailed in the 1990s and 2000s, while dry conditions predominated in the 2010s, when the longest and more severe dry events have been identified at the four scales.

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Section: Definition Of the Lagrangian Approach For The Moisture Transmentioning

confidence: 99%

Section: Definition Of the Lagrangian Approach For The Moisture Transmentioning

confidence: 99%

Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index

et al. 2021

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“…ARs act as bridges or conveyors between oceanic evaporation and continental precipitation 12,13 , the former being the main origin of water vapor that reaches land masses at extratropical latitudes. ARs have also been linked with changes in water storage and the mass balance of ice sheets, glaciers, and snowpack 14,15 .…”

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Significant increase of global anomalous moisture uptake feeding landfalling Atmospheric Rivers

et al. 2020

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One of the most robust signals of climate change is the relentless rise in global mean surface temperature, which is linked closely with the water-holding capacity of the atmosphere. A more humid atmosphere will lead to enhanced moisture transport due to, among other factors, an intensification of atmospheric rivers (ARs) activity, which are an important mechanism of moisture advection from subtropical to extra-tropical regions. Here we show an enhanced evapotranspiration rates in association with landfalling atmospheric river events. These anomalous moisture uptake (AMU) locations are identified on a global scale. The interannual variability of AMU displays a significant increase over the period 1980-2017, close to the Clausius-Clapeyron (CC) scaling, at 7 % per degree of surface temperature rise. These findings are consistent with an intensification of AR predicted by future projections. Our results also reveal generalized significant increases in AMU at the regional scale and an asymmetric supply of oceanic moisture, in which the maximum values are located over the region known as the Western Hemisphere Warm Pool (WHWP) centred on the Gulf of Mexico and the Caribbean Sea.

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“…Despite the record values of precipitable water, rainfall totals for Harvey were more than an order of magnitude larger than the temporal change in precipitable water; water vapor transport was a key ingredient of record rainfall. The central role of atmospheric water vapor transport for extreme rainfall has been highlighted in research on Atmospheric Rivers (Dettinger et al., 2011; Gimeno et al., 2020; Mahoney et al., 2016; Moore et al., 2012; Ralph et al., 2016). The largest values of water vapor transport have been linked to the most extreme impacts from extreme rainfall and flooding (Chen et al., 2019; Dettinger et al., 2011; Lavers & Villarini, 2013, 2015).…”

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confidence: 99%

An Atmospheric Water Balance Perspective on Extreme Rainfall Potential for the Contiguous US

Smith

2021

Water Resources Research

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Recent progress on the sources of continental precipitation as revealed by moisture transport analysis

Cited by 93 publications

References 301 publications

Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index

Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index

Significant increase of global anomalous moisture uptake feeding landfalling Atmospheric Rivers

An Atmospheric Water Balance Perspective on Extreme Rainfall Potential for the Contiguous US

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