Patterns of change in high frequency precipitation variability over North America

Roque‐Malo, Susana; Kumar, Praveen

doi:10.1038/s41598-017-10827-8

Cited by 47 publications

(35 citation statements)

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“…; Almeida et al . ; Roque‐Malo & Kumar ). In particular, in Europe a positive trend in the north and a negative one in the south have been observed in the last century (Schonwiese & Rapp ; Fleig et al .…”

Section: Introductionmentioning

confidence: 99%

“…For example, long-term precipitation trends have been observed in several large areas such as southern Europe and the Mediterranean region, central Europe, central North America, central America and Mexico, northeast Brazil, China, Oceania and southern Africa (e.g. Martins et al 2012;Caloiero 2014;Caloiero 2015;Dashtpagerdi et al 2015;Chen et al 2016;Almeida et al 2017;Roque-Malo & Kumar 2017). In particular, in Europe a positive trend in the north and a negative one in the south have been observed in the last century (Schonwiese & Rapp 1997;Fleig et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Long‐term precipitation trend analysis in Europe and in the Mediterranean basin

Caloiero

Frustaci

2018

Water & Environment J

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The spatiotemporal analysis of a region's precipitation climate regime could be particularly interesting for many fields of applied sciences, such as climatology, hydrology and water resources management. In this study, the precipitation trends at seasonal and annual scale, over a large area of the northern Hemisphere have been analysed based on a globally gridded precipitation data sets of monthly observations. In particular, among the several data sets available in literature, with spatial resolutions of 0.5° longitude/latitude, in this work the Global Precipitation Climatology Centre Full Data Reanalysis Version 6 data set has been used. The broad extension of the area under investigation allowed a better understanding of trend precipitation patterns over space. In fact, yearly results evidenced a marked negative rainfall tendency in the eastern Mediterranean (more than −20 mm/10 years) and in North Africa (until −16 mm/10 years), while a relatively large positive trend (more than 20 mm/10 years) in central and northern Europe has been observed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long‐term precipitation trend analysis in Europe and in the Mediterranean basin

Caloiero

Frustaci

2018

Water & Environment J

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“…Anthropogenic greenhouse gas emissions have resulted in increasing global temperatures, enhanced evaporation from soil and the oceans, and higher atmospheric concentrations of H 2 O v , the dominant absorber of infrared radiation (Held and Soden, 2006;Hurley and Galewsky, 2010;Willett et al, 2007). Warmer temperatures and more humid conditions have caused a shift towards less frequent but more intense precipitation events, increasing the risk of both floods and droughts (Roque-Malo and Kumar, 2017;Trenberth, 2011). H 2 O v also modulates production of the dominant atmospheric oxidant, the hydroxyl radical (Thompson, 1992).…”

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confidence: 99%

Vertical profile observations of water vapor deuterium excess in the lower troposphere

Salmon

Welp²,

Baldwin³

et al. 2019

Atmos. Chem. Phys.

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Abstract. We use airborne measurements of water vapor (H2Ov) stable isotopologues and complementary meteorological observations to examine how boundary layer (BL) dynamics, cloud processing, and atmospheric mixing influence the vertical structure of δD, δ18O, and deuterium excess (d excess =δD–8×δ18O) in the BL, inversion layer (INV), and lower free troposphere (FT). Flights were conducted around two continental US cities in February–March 2016 and included vertical profiles extending from near the surface to ≤2 km. We examine observations from three unique case study flights in detail. One case study shows observations that are consistent with Rayleigh isotopic distillation theory coinciding with clear skies, dry adiabatic lapse rates within the boundary layer, and relatively constant vertical profiles of wind speed and wind direction. This suggests that the air mass retained the isotopic fingerprint of dehydration during moist adiabatic processes upwind of the study area. Also, observed d-excess values in the free troposphere were sometimes larger than Rayleigh theory predicts, which may indicate mixing of extremely dehydrated air from higher altitudes. The two remaining case studies show isotopic anomalies in the d-excess signature relative to Rayleigh theory and indicate cloud processes and complex boundary layer development. The most notable case study with stratocumulus clouds present had extremely low (negative) d-excess values at the interface of the inversion layer and the free troposphere, which is possibly indicative of cloud or rain droplet evaporation. We discuss how in situ H2Ov stable isotope measurements, and d excess in particular, could be useful for improving our understanding of water phase changes, transport, and mixing that occurs between the BL, INV, and FT.

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“…Roque-Malo and Kumar (2017) investigated the potential microclimate role as an explanatory variable of changes in precipitation indices patterns; they found that the climate diversity or microclimate was responsible for the lack of uniformity in the trends found in their study area. They added that the extent of the uniformity of trends was also influenced by how the changes and rotation in the vegetation covered and land use occurred (Roque-Malo and Kumar, 2017 (INEGI, 1990(INEGI, , 2016. In Aguascalientes, the local microclimate and characteristics of the vegetation at each weather station could be significant contributors in the spatial pattern of extreme index trends.…”

Section: Microclimate Effect In the Spatial Distribution Of Precipimentioning

confidence: 99%

Observed trends in daily extreme precipitation indices in Aguascalientes, Mexico

Ruíz-Álvarez

Singh

Enciso³

et al. 2019

Meteorological Applications

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Precipitation and its distribution greatly influence the evolution of ecosystems and the development of society. The objective was to analyse trends in extreme precipitation indices at 25 weather stations of Aguascalientes State. Eleven extreme precipitation indices were obtained. The time series of these indices were analysed with the non‐parametric Mann–Kendall test. The number of days above 50 mm, consecutive wet days, and extremely wet days did not have significant trends at any of the weather stations. Each of the indices maximum 1 day precipitation amount, maximum 5 day precipitation amount and number of very heavy precipitation days showed a significant positive trend at 12% of the weather stations; both the number of heavy precipitation days and the number of very wet days had significant positive trends at 8% of the weather stations; the simple daily intensity index, consecutive dry days and annual total wet‐day precipitation showed significant positive trends at 20%, 36% and 4% of weather stations, respectively. The intensity index was the only one that showed a significant negative trend, which happened at 4% of the weather stations. In a small part of Aguascalientes, the precipitation intensity, the number of rainy days and the accumulated total increased in short periods. Also, in a reduced region, daily precipitation intensity decreased; and in another very small area the number of dry days increased. For mitigating the effects of these phenomena, it is suggested that water be used more efficiently for sustained agricultural production systems and ecosystem management. The results of the present study will be of great importance in future economic planning in the Aguascalientes State.

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Patterns of change in high frequency precipitation variability over North America

Cited by 47 publications

References 47 publications

Long‐term precipitation trend analysis in Europe and in the Mediterranean basin

Long‐term precipitation trend analysis in Europe and in the Mediterranean basin

Vertical profile observations of water vapor deuterium excess in the lower troposphere

Observed trends in daily extreme precipitation indices in Aguascalientes, Mexico

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