2018
DOI: 10.1029/2017ms001260
|View full text |Cite
|
Sign up to set email alerts
|

A Groundwater and Runoff Formulation for Weather and Climate Models

Abstract: Soil moisture modifies the state of the atmosphere and thus plays a major role in the climate system. Its spatial distribution is strongly modulated by the underlying orography. Yet the vertical transport of soil water and especially the generation of groundwater runoff at the bottom of the soil column are currently treated in a crude way in most atmospheric and climate models. This potentially leads to large biases in near‐surface temperatures during midlatitude summertime conditions, when the soils may dry o… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
52
0

Year Published

2018
2018
2024
2024

Publication Types

Select...
7
1

Relationship

1
7

Authors

Journals

citations
Cited by 41 publications
(52 citation statements)
references
References 61 publications
0
52
0
Order By: Relevance
“…To explain the model discrepancies in the vertical distribution of lower and midtropospheric moisture, we consider two main factors: (i) differences in soil moisture conditions (soils are overall drier in the convection‐resolving compared to the convection‐parameterizing model Ban et al, ; we believe that this is due to a higher precipitation intensity in CTRL2, which leads to an increased surface runoff; Schlemmer et al, ) and (ii) differences in the efficiency of the vertical transport of available moisture (resolved vertical motions are stronger when convection is resolved explicitly; Leutwyler et al, ). We have verified, based on a simple experiment in which we have isolated the impact of different soil moisture conditions, that factor (i) only has a limited effect on the vertical distribution of atmospheric moisture (not shown here).…”
Section: Evaluation Of Clouds In Present‐day Climatementioning
confidence: 99%
“…To explain the model discrepancies in the vertical distribution of lower and midtropospheric moisture, we consider two main factors: (i) differences in soil moisture conditions (soils are overall drier in the convection‐resolving compared to the convection‐parameterizing model Ban et al, ; we believe that this is due to a higher precipitation intensity in CTRL2, which leads to an increased surface runoff; Schlemmer et al, ) and (ii) differences in the efficiency of the vertical transport of available moisture (resolved vertical motions are stronger when convection is resolved explicitly; Leutwyler et al, ). We have verified, based on a simple experiment in which we have isolated the impact of different soil moisture conditions, that factor (i) only has a limited effect on the vertical distribution of atmospheric moisture (not shown here).…”
Section: Evaluation Of Clouds In Present‐day Climatementioning
confidence: 99%
“…The UK Met Office's Hadley Centre Sea Ice and Sea Surface Temperature dataset (HadISST 1.1) (Rayner et al, 2002) is used to retrieve SST information for the Indian and the Pacific Ocean. Monthly precipitation fields from the Global Precipitation Climatology Centre (GPCC) (Schneider et al, 2008) are used as a precipitation observational record together with a high-resolution dataset, covering only the monsoon South Asia domain, namely the Asian Precipitation-Highly-Resolved Observational Data Integration Towards Evaluation (APHRODITE) monthly accumulated precipitation (Akiyo et al, 2012). The rainfall, winds, and specific humidity are taken from the National Center for Environmental Prediction-National Center for Atmospheric Research (NCEP-NCAR) reanalysis dataset (Kalnay et al, 1996).…”
Section: Observational Reanalysis Datasets and Indicesmentioning
confidence: 99%
“…Two-stream radiative transfer calculations are based on Ritter and Geleyn (1992), the convection is parameterized by Tiedtke (1989), the turbulent surface energy transfer and planetary boundary layer use the parameterization of Raschendorfer (2001), and precipitation is based on a four-category microphysics scheme that includes cloud, rainwater, snow, and ice (Doms et al, 2011). The soilvegetation-atmosphere transfer uses TERRA-ML (Schrodin and Heise, 2002); however, this current version employs a modified groundwater formulation (Schlemmer et al, 2018).…”
Section: Global and Regional Climate Simulationsmentioning
confidence: 99%
“…Because in most land surface models (LSMs) water transport and runoff has historically been treated in a simplified way, combined with free drainage lower boundary conditions in the subsurface, soil moisture states and fluxes and interactions between groundwater and soil moisture are biased with multiple impacts especially in areas with shallower groundwater, e.g., on the land-atmosphere coupling and the reproduction of extremes such as heat waves 6 . Recent LSM model improvements for regional climate models (RCMs) 7,8 can lead to physically consistent interactions between the groundwater, the vadose zone, and the land-surface. Yet, many RCMs and global climate models (GCMs), contributing to CMIP5 3 or CORDEX 9 still simplify these interactions.…”
Section: Background and Summarymentioning
confidence: 99%