Akash Koppa
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View article: Observational evidence of compensatory influences of deforestation on downwind precipitation in Brazilian breadbaskets
Observational evidence of compensatory influences of deforestation on downwind precipitation in Brazilian breadbaskets Open
View article: Increasing atmospheric evaporative demand across the Tibetan plateau and implications for surface water resources
Increasing atmospheric evaporative demand across the Tibetan plateau and implications for surface water resources Open
View article: Universal differential equations for estimating terrestrial evaporation
Universal differential equations for estimating terrestrial evaporation Open
Terrestrial evaporation (E) is an essential climate variable, linking water, energy and carbon cycles. As E is influenced by the state of the atmospheric boundary layer, vegetation and soil, its modelling is a complex task, resulting in a …
View article: GLEAM4: global land evaporation and soil moisture dataset at 0.1° resolution from 1980 to near present
GLEAM4: global land evaporation and soil moisture dataset at 0.1° resolution from 1980 to near present Open
Terrestrial evaporation plays a crucial role in modulating climate and water resources. Here, we present a continuous, daily dataset covering 1980-2023 with a 0.1°spatial resolution, produced using the fourth generation of the Global Land …
View article: Increasing atmospheric evaporative demand across the Tibetan plateau and implications for surface water resources
Increasing atmospheric evaporative demand across the Tibetan plateau and implications for surface water resources Open
View article: East–West asymmetry in intensity, duration, frequency of heatwaves over Northern India
East–West asymmetry in intensity, duration, frequency of heatwaves over Northern India Open
Anthropogenic global warming has led to widespread increase in the heatwave intensity, duration, and frequency (HIDF) of events across the globe. Although the three characteristics of heatwaves are closely interconnected, they are often st…
View article: GLEAM4: global land evaporation dataset at 0.1° resolution from 1980 to near present
GLEAM4: global land evaporation dataset at 0.1° resolution from 1980 to near present Open
Terrestrial evaporation plays a crucial role in modulating climate and water resources. Here, we present a continuous, daily dataset covering 1980–2023 with a 0.1° spatial resolution, produced using the fourth generation of the Global Land…
View article: Multi‐Decadal Dynamics of Global Rainfall Interception and Their Drivers
Multi‐Decadal Dynamics of Global Rainfall Interception and Their Drivers Open
Rainfall interception loss ( E i ) is a difficult to study and poorly understood flux compared to transpiration and soil evaporation. The influence of climate and vegetation on E i is not well known at continental‐to‐global and annual‐to‐d…
View article: Dryland self-expansion enabled by land–atmosphere feedbacks
Dryland self-expansion enabled by land–atmosphere feedbacks Open
Dryland expansion causes widespread water scarcity and biodiversity loss. Although the drying influence of global warming is well established, the role of existing drylands in their own expansion is relatively unknown. In this work, by tra…
View article: Drivers and mechanisms of heatwaves in South West India
Drivers and mechanisms of heatwaves in South West India Open
View article: Example input data GLEAMv4: 2004-01
Example input data GLEAMv4: 2004-01 Open
Example input data for GLEAMv4 for January 2004. GLEAM is a global evaporation model, more info can be found at GLEAM | Global Land Evaporation Amsterdam Model.
View article: Analysis of moisture recycling at unprecedented resolution in the western Mediterranean region 
Analysis of moisture recycling at unprecedented resolution in the western Mediterranean region  Open
The western Mediterranean region is a climate change hotspot, where the increase in temperature far exceeds the global average. This is causing its hydrological cycle to be highly impacted, with an increase in the frequency and intensity o…
View article: Improving global evaporation estimation using GRACE and GRACE-FO satellite data assimilation
Improving global evaporation estimation using GRACE and GRACE-FO satellite data assimilation Open
The accurate monitoring and prediction of land water cycle components are crucial for applications in climate, hydrology, and agriculture. However, the remote sensing of ecohydrological variables, though essential, still faces challenges, …
View article: GLEAM4: Improving global terrestrial evaporation estimates with hybrid modelling 
GLEAM4: Improving global terrestrial evaporation estimates with hybrid modelling  Open
Terrestrial evaporation (E) is a keystone flux linking water, energy and carbon cycles. Consequently, monitoring of E at high temporal and spatial resolution over an extended period is crucial to diagnose climate change and its influence o…
View article: Leveraging Information Flow for Data-Driven Subseasonal Forecasting of Sahelian Hot Extremes
Leveraging Information Flow for Data-Driven Subseasonal Forecasting of Sahelian Hot Extremes Open
The semi-arid Sahel region has witnessed an increase in extreme weather conditions such as repeated drought cycles, desertification, heatwaves and floods in recent decades. These events pose existential threats to the already vulnerable po…
View article: Multi-decadal change in global rainfall interception and its drivers
Multi-decadal change in global rainfall interception and its drivers Open
Rainfall interception loss (Ei) is one of the biggest unknowns in the global hydrological cycle. As a dynamic process, Ei depends on vegetation structure and canopy characteristics, but also on the precipitation and (micro)climatic conditi…
View article: Multi-scale hybrid modeling of terrestrial evaporation
Multi-scale hybrid modeling of terrestrial evaporation Open
Hybrid modeling – combining physics with machine learning – in recent years has pushed the frontiers of Earth science, providing an opportunity to accurately characterize traditionally elusive variables. Terrestrial evapo…
View article: Relative contributions of atmospheric circulation and evaporation to the faster onset of flash droughts
Relative contributions of atmospheric circulation and evaporation to the faster onset of flash droughts Open
Flash droughts are characterized by their abrupt onset and rapid intensification. Identifying and quantifying the factors that trigger and accelerate the onset of flash droughts is crucial for establishing reliable early warning systems, a…
View article: Recent intensification of the negative physiological effect of CO2 on terrestrial evaporation
Recent intensification of the negative physiological effect of CO2 on terrestrial evaporation Open
The net physiological effect of rising atmospheric carbon dioxide (aCO2) on terrestrial evaporation (ET) is highly uncertain. While increased CO2 fertilization elevates ET through more biomass production, the reduction in stomatal conducta…
View article: Towards a continuous, multiyear, high resolution dataset of evaporation  over Europe and Africa
Towards a continuous, multiyear, high resolution dataset of evaporation  over Europe and Africa Open
High resolution accurate evaporation (E) estimates are crucial for large-scale agricultural, ecological, and hydrological applications. However, field observations are sparse, traditional satellite-based datasets based on thermal and optic…
View article: Subseasonal prediction of heatwaves in the Iberian Peninsula using causality-based transformer networks.
Subseasonal prediction of heatwaves in the Iberian Peninsula using causality-based transformer networks. Open
Subseasonal prediction of heatwaves, although highly valuable for risk reduction, is challenging because heatwave onsets and propagation are complex processes with both fast and slow drivers from local to global scale. Traditionally, subse…
View article: Data: Dryland self-expansion enabled by land-atmosphere feedbacks
Data: Dryland self-expansion enabled by land-atmosphere feedbacks Open
The repository contains the scripts and data required to reproduced the final figures in the article: Dryland self-expansion enabled by land-atmosphere feedbacks. Link to the article: https://doi.org/10.1126/science.adn6833.
View article: Data: Dryland self-expansion enabled by land-atmosphere feedbacks
Data: Dryland self-expansion enabled by land-atmosphere feedbacks Open
The repository contains the scripts and data required to reproduced the final figures in the article: Dryland self-expansion enabled by land-atmosphere feedbacks. Link to the article: https://doi.org/10.1126/science.adn6833.
View article: Example input data GLEAMv4: 2004-01
Example input data GLEAMv4: 2004-01 Open
Example input data for GLEAMv4 for January 2004. GLEAM is a global evaporation model, more info can be found in GLEAM | Global Land Evaporation Amsterdam Model.
View article: Example input data GLEAMv4: 2004-01
Example input data GLEAMv4: 2004-01 Open
Example input data for GLEAMv4 for January 2004. GLEAM is a global evaporation model, more info can be found in GLEAM | Global Land Evaporation Amsterdam Model.
View article: Recent intensification of the negative physiological effect of CO2 on terrestrial evaporation
Recent intensification of the negative physiological effect of CO2 on terrestrial evaporation Open
The net physiological effect of rising atmospheric carbon dioxide (aCO2) on terrestrial evaporation (ET) is highly uncertain. While increased CO2 fertilization elevates ET through more biomass production, the reduction in stomatal conducta…
View article: On the role of the Atlantic Meridional Mode in eastern European temperature variability
On the role of the Atlantic Meridional Mode in eastern European temperature variability Open
View article: Global Climate
Global Climate Open
Air temperature measurements have been made onboard ships for centuries and continue to be collected today thanks to the Voluntary Observing Ship initiative (https://www.ocean-ops.org/reportcard2022/). Gridded datasets of marine air temper…
View article: Incorporating Plant Access to Groundwater in Existing Global, Satellite‐Based Evaporation Estimates
Incorporating Plant Access to Groundwater in Existing Global, Satellite‐Based Evaporation Estimates Open
Groundwater is an important water source for evaporation, especially during dry conditions. Despite this recognition, plant access to groundwater is often neglected in global evaporation models. This study proposes a new, conceptual approa…
View article: A Lagrangian Analysis of the Sources of Rainfall Over the Horn of Africa Drylands
A Lagrangian Analysis of the Sources of Rainfall Over the Horn of Africa Drylands Open
The Horn of Africa drylands (HAD) are among the most vulnerable regions to hydroclimatic extremes. The two rainfall seasons—long and short rains—exhibit high intraseasonal and interannual variability. Accurately simulating the long and sho…