نتایج جستجو برای: precipitation deficit
تعداد نتایج: 122121 فیلتر نتایج به سال:
Abstract. Actual evapotranspiration (ET) is an essential variable in the hydrological process, linking carbon, water, and energy cycles. Global ET has significantly changed warming climate. Although increasing vapor pressure deficit (VPD) enhances atmospheric water demand due to global warming, it remains unclear how dynamics of are affected. In this study, using multiple datasets, we disentang...
Abstract Drought is a key challenge for third-world countries whose economies are based on agriculture. Also, lack of rainfall plays major role in accelerating climate change. resulting decline vegetation greenness and plant mortality specifically the semi-arid region. In this study, satellite-based drought assessment was used to characterize its impact forests regions Ethiopia. severity forest...
Throughout history, Europe and North America have experienced intense long-lasting droughts with large impacts on society ecosystem such as the recent drought 2018/2019 historical 1540 in Europe, or US Dust Bowl of 1930s. To increase resilience develop adaptation strategies to extreme droughts, it is important understand how dry a worst-case would be long take recover from it. This study introd...
[1] Atmospheric fronts are important for the day-to-day variability of weather in the midlatitudes, particularly during winter when extratropical storm-tracks are at their maximum intensity. Fronts are often associated with heavy rain, and strongly affect the local space-time distribution of rainfall. A recently developed objective front identification method that distinguishes between cold, wa...
The Southwestern U.S. has been in a megadrought for the past two decades, stressing vegetation across region and leading to poor forage conditions on rangelands. How human-induced climate change affected air temperatures atmospheric evaporative demand greater Four Corners of Southwest, what have corresponding impacts vegetative productivity? We address this question via multi-step detection att...
Uncertainty about responses of vegetation index, aboveground biomass (AGB) and gross primary production (GPP) limits our ability to predict how climatic warming will influence plant growth in alpine regions. A field warming experiment was conducted in an alpine meadow at a low (4313 m), mid- (4513 m) and high elevation (4693 m) in the Northern Tibet since May 2010. Growing season vapor pressure...
Water use efficiency (WUE) is an important indicator of ecosystem functioning but how ecosystem WUE responds to climate change including precipitation and nitrogen (N) deposition increases is still unknown. To investigate such responses, an experiment with a randomized block design with water (spring snowfall or summer water addition) and nitrogen addition was conducted in a temperate steppe of...
The adjustment of the tropical climate outside the Pacific (the “remote Tropics”) to the abrupt onset of El Niño conditions is examined in a tropical atmosphere model that assumes simplified vertical structure and quasi-equilibrium (QE) convective closure. The El Niño signal is rapidly ( 1 week) communicated to the remote Tropics via an eastward-propagating Kelvin-like wave that induces both an...
Climate change may cause severe hydrological droughts, leading to water shortages which will require be assessed using high-resolution data. Gravity Recovery and Experiment (GRACE) satellite Terrestrial Water Storage (TWSA) estimates offer a promising solution monitor drought, but its coarse resolution (1°) limits applications small regions of the Indus Basin Irrigation System (IBIS). Here we e...
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