Journal ArticleJournal of Geophysical Research: Atmospheres · September 28, 2024
Surface fluxes and states can recur and remain consistent across various spatial and temporal scales, forming space-time patterns. Quantifying and understanding the observed patterns is desirable, as they provide information about the dynamics of the proce ...
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Journal ArticleJournal of Geophysical Research: Atmospheres · July 16, 2024
Dust transported from rangelands of the Southwestern United States (US) to mountain snowpack in the Upper Colorado River Basin during spring (March-May) forces earlier and faster snowmelt, which creates problems for water resources and agriculture. To bett ...
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Journal ArticleJournal of Geophysical Research: Atmospheres · June 28, 2024
This manuscript investigates the impact of land-surface heterogeneity on atmospheric processes by comparing 92 large-eddy simulation cases over the Southern Great Plains, leveraging high-resolution spatially heterogeneous and homogeneous land-surface field ...
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Journal ArticleJournal of Advances in Modeling Earth Systems · May 1, 2024
Earth system models currently struggle to account for the complex effects that land surface heterogeneity can have on land-atmosphere interactions. There have been attempts to include the impact of this heterogeneity on the atmosphere, but they ignore the ...
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Journal ArticleJournal of Advances in Modeling Earth Systems · March 1, 2024
Land-atmosphere interactions are central to the evolution of the atmospheric boundary layer and the subsequent formation of clouds and precipitation. Existing global climate models represent these connections with bulk approximations on coarse spatial scal ...
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Journal ArticleGeoscientific Model Development · February 29, 2024
Land-atmosphere (L-A) interactions are important for understanding convective processes, climate feedbacks, the development and perpetuation of droughts, heatwaves, pluvials, and other land-centered climate anomalies. Local L-A coupling (LoCo) metrics capt ...
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Conference30th European Meeting of Environmental and Engineering Geophysics, Held at the Near Surface Geoscience Conference and Exhibition 2024, NSG 2024 · January 1, 2024
Arctic urban environments and their infrastructure are at an increased risk of damage due to their direct interaction with the Critical Zone, where an increasing frequency of frost quakes was recently detected (Battaglia and Changnon, 2016). On the previou ...
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Journal ArticleHydrology and Earth System Sciences · July 26, 2023
The transport of water, heat, and momentum from the surface to the atmosphere is dependent, in part, on the characteristics of the land surface. Along with the model physics, parameterization schemes, and parameters employed, land datasets determine the sp ...
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Journal ArticleGeoscientific Model Development · April 6, 2023
Parameterizing incident solar radiation over complex topography regions in Earth system models (ESMs) remains a challenging task. In ESMs, downward solar radiative fluxes at the surface are typically computed using plane-parallel radiative transfer schemes ...
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Journal ArticleWater Resources Research · April 1, 2023
This study assesses the added value of using emerging maps of soil properties to improve surface soil moisture simulations using the HydroBlocks land surface model with different soil hydraulic parameterization schemes. Simulations were run at an hourly 30 ...
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Journal ArticleWater Resources Research · December 1, 2022
One of the persistent challenges of Land Surface Models (LSMs) is to determine a realistic yet efficient sub-grid representation of heterogeneous landscapes. This is particularly important in emulating the fine-scale and nonlinear interactions between wate ...
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Journal ArticleGeoscientific Model Development · August 29, 2022
The Earth’s land surface features spatial and temporal heterogeneity over a wide range of scales below those resolved by current Earth system models (ESMs). State-of-the-art land and atmosphere models employ parameterizations to represent their subgrid het ...
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Journal ArticleGeophysical Research Letters · August 16, 2022
Soil moisture (SM) spatiotemporal variability critically influences water resources, agriculture, and climate. However, besides site-specific studies, little is known about how SM varies locally (1–100-m scale). Consequently, quantifying the SM variability ...
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Journal ArticleJournal of Geophysical Research: Atmospheres · April 27, 2022
Earth system models (ESMs) and mesoscale models have come to employ increasingly complex parameterization schemes for the atmospheric boundary layer, requiring surface boundary conditions for numerous higher order turbulence statistics. Of particular inter ...
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Journal ArticleGeoderma · December 1, 2021
Current pedotransfer functions (PTFs) for estimating soil hydraulic curves are mostly developed to predict parameters of the Mualem-van Genuchten hydraulic functions. The Mualem-van Genuchten functions are recognised to be inadequate in representing soil w ...
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Journal ArticleGeoscientific Model Development · November 9, 2021
Over the past decade, there has been appreciable progress towards modeling the water, energy, and carbon cycles at field scales (10-100 m) over continental to global extents in Earth system models (ESMs). One such approach, named HydroBlocks, accomplishes ...
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Journal ArticleScientific data · October 2021
Soil moisture plays a key role in controlling land-atmosphere interactions, with implications for water resources, agriculture, climate, and ecosystem dynamics. Although soil moisture varies strongly across the landscape, current monitoring capabilities ar ...
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Journal ArticleJournal of Advances in Modeling Earth Systems · October 1, 2021
Contemporary Earth system models mostly ignore the sub-grid scale (SGS) heterogeneous coupling between the land surface and atmosphere. To aid in the development of coupled land and atmosphere SGS parameterizations for global models, we present a study of ...
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Journal ArticleHydrology and Earth System Sciences · April 9, 2021
Soil moisture is highly variable in space and time, and deficits (i.e., droughts) play an important role in modulating crop yields. Limited hydroclimate and yield data, however, hamper drought impact monitoring and assessment at the farm field scale. This ...
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Journal ArticleArabian Journal of Geosciences · April 1, 2021
The overall objective of this study is to evaluate and correct the Tropical Rainfall Measuring Mission (TRMM) 3B42 algorithm for Northern Tunisia focusing on heavy rainfall events. Two types of correction methods are tested. The first is the combined schem ...
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Journal ArticleRemote Sensing of Environment · June 1, 2020
Accurate and detailed soil moisture information is essential for, among other things, irrigation, drought and flood prediction, water resources management, and field-scale (i.e., tens of m) decision making. Recent satellite missions measuring soil moisture ...
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Journal ArticleJournal of Hydrology · August 1, 2019
Advances in sensor technologies provide the potential for real-time monitoring of soil moisture status. Little work has been conducted to study the spatial and temporal variations of soil water content at the field scale and the interactions between soil w ...
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Journal ArticleWater Resources Research · April 1, 2019
Soils play a critical role in the cycling of water, energy, and carbon in the Earth system. Until recently, due primarily to a lack of soil property maps of a sufficiently high-quality and spatial detail, a minor emphasis has been placed on providing high- ...
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Journal ArticleWater Resources Research · February 1, 2019
Earth System Models (ESMs) are essential tools for understanding and predicting global change, but they cannot explicitly resolve hillslope-scale terrain structures that fundamentally organize water, energy, and biogeochemical stores and fluxes at subgrid ...
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Journal ArticleJournal of Climate · August 1, 2018
Sensible heat flux is a turbulent flux driving interactions between the Earth's surface and the atmosphere, propelling local and regional climate. While turbulent fluxes are measured in situ, global scales require estimates at larger spatial scales, which ...
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Journal ArticleHydrology and Earth System Sciences · June 14, 2018
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The continual growth in the availability, detail, and wealth of environmental data provides an invaluable asset to improve the characterization of land heterogeneity in Earth system models-a persistent challenge in macroscale models. However, due to the na ...
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Journal ArticleJournal of Geophysical Research: Atmospheres · May 27, 2018
Sensible heat flux directly influences local and regional climate and can be estimated using remotely sensed satellite observations. Although significant efforts have been made to estimate sensitivity and uncertainty in energy flux estimates at the local a ...
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Journal ArticleWater Resources Research · April 1, 2017
Accurate global mapping of soil moisture is the goal of the Soil Moisture Active Passive (SMAP) mission, which is expected to improve the estimation of water, energy, and carbon exchanges between the land and the atmosphere. Like other satellite products, ...
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Journal ArticleJournal of Geophysical Research: Atmospheres · November 27, 2016
With their origins in numerical weather prediction and climate modeling, land surface models aim to accurately partition the surface energy balance. An overlooked challenge in these schemes is the role of model parameter uncertainty, particularly at unmoni ...
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Journal ArticleWater Resources Research · October 1, 2016
This paper introduces Prec-DWARF (Precipitation Downscaling With Adaptable Random Forests), a novel machine-learning based method for statistical downscaling of precipitation. Prec-DWARF sets up a nonlinear relationship between precipitation at fine resolu ...
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Journal ArticleHydrological Processes · September 30, 2016
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Land surface spatial heterogeneity plays a significant role in the water, energy, and carbon cycles over a range of temporal and spatial scales. Until now, the representation of this spatial heterogeneity in land surface models has been limited to over sim ...
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Journal ArticleGeophysical Research Letters · September 28, 2016
At the end of its first year of operation, we compare soil moisture retrievals from the Soil Moisture Active Passive (SMAP) mission to simulations from a land surface model with meteorological forcing downscaled from observations/reanalysis and in situ obs ...
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Journal ArticlePhilosophical transactions of the Royal Society of London. Series B, Biological sciences · September 2016
Rapidly rising populations and likely increases in incomes in sub-Saharan Africa make tens of millions of hectares of cropland expansion nearly inevitable, even with large increases in crop yields. Much of that expansion is likely to occur in higher rainfa ...
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Journal ArticleGeoderma · July 15, 2016
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A new complete map of soil series probabilities has been produced for the contiguous United States at a 30 m spatial resolution. This innovative database, named POLARIS, is constructed using available high-resolution geospatial environmental data and a sta ...
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Journal ArticleRemote Sensing of Environment · December 15, 2015
This study extends the popular triple collocation method for error assessment from three source estimates to an arbitrary number of source estimates, i.e., to solve the "multiple" collocation problem. Past efforts on multiple collocation fall short of deli ...
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Journal ArticleHydrology and Earth System Sciences · July 24, 2015
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Land surface modeling, in conjunction with numerical weather forecasting and satellite remote sensing, is playing an increasing role in global monitoring and prediction of extreme hydrologic events (i.e., floods and droughts). However, uncertainties in the ...
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Journal ArticleGlobal Food Security · March 1, 2015
Governments, aid organizations and people affected by drought are struggling to mitigate the resulting impact on both water resources and crops. In this paper we focus on improved decision-support for agricultural droughts that threaten the livelihoods of ...
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Journal ArticleWater Resources Research · January 1, 2015
The spatial heterogeneity of soil moisture remains a persistent challenge in the design of in situ measurement networks, spatial downscaling of coarse estimates (e.g., satellite retrievals), and hydrologic modeling. To address this challenge, we analyze hi ...
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