Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 5307-5329 |
| Seitenumfang | 23 |
| Fachzeitschrift | Geoscientific Model Development |
| Jahrgang | 14 |
| Ausgabenummer | 8 |
| Publikationsstatus | Veröffentlicht - 23 Aug. 2021 |
Abstract
In this paper the land surface model embedded in the PALM model system is described and evaluated against in situ measurements at Cabauw, Netherlands. A total of 2 consecutive clear-sky days are simulated, and the components of surface energy balance, potential temperature, humidity, and horizontal wind speed are compared to observations. For the simulated period, components of the energy balance are consistent with daytime and nighttime observations, and the daytime Bowen ratio also agrees fairly well with observations. The model simulates a more stably stratified nocturnal boundary layer than the observations, and near-surface potential temperature and humidity agree fairly well during the day. Moreover, a sensitivity analysis is performed to investigate dependence of the model on land surface and soil specifications, as well as atmospheric initial conditions, because they represent a major source of uncertainty in the simulation setup. It is found that an inaccurate estimation of leaf area index, albedo, or initial humidity causes a significant misrepresentation of the daytime turbulent sensible and latent heat fluxes. During the night, the boundary-layer characteristics are primarily affected by surface roughness and the applied radiation schemes.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Mathematik (insg.)
- Modellierung und Simulation
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in: Geoscientific Model Development, Jahrgang 14, Nr. 8, 23.08.2021, S. 5307-5329.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Modeling of land-surface interactions in the PALM model system 6.0
T2 - Land surface model description, first evaluation, and sensitivity to model parameters
AU - Gehrke, Katrin Frieda
AU - Sühring, Matthias
AU - Maronga, Björn
N1 - Funding Information: Financial support. This research has been supported by the Fed-
PY - 2021/8/23
Y1 - 2021/8/23
N2 - In this paper the land surface model embedded in the PALM model system is described and evaluated against in situ measurements at Cabauw, Netherlands. A total of 2 consecutive clear-sky days are simulated, and the components of surface energy balance, potential temperature, humidity, and horizontal wind speed are compared to observations. For the simulated period, components of the energy balance are consistent with daytime and nighttime observations, and the daytime Bowen ratio also agrees fairly well with observations. The model simulates a more stably stratified nocturnal boundary layer than the observations, and near-surface potential temperature and humidity agree fairly well during the day. Moreover, a sensitivity analysis is performed to investigate dependence of the model on land surface and soil specifications, as well as atmospheric initial conditions, because they represent a major source of uncertainty in the simulation setup. It is found that an inaccurate estimation of leaf area index, albedo, or initial humidity causes a significant misrepresentation of the daytime turbulent sensible and latent heat fluxes. During the night, the boundary-layer characteristics are primarily affected by surface roughness and the applied radiation schemes.
AB - In this paper the land surface model embedded in the PALM model system is described and evaluated against in situ measurements at Cabauw, Netherlands. A total of 2 consecutive clear-sky days are simulated, and the components of surface energy balance, potential temperature, humidity, and horizontal wind speed are compared to observations. For the simulated period, components of the energy balance are consistent with daytime and nighttime observations, and the daytime Bowen ratio also agrees fairly well with observations. The model simulates a more stably stratified nocturnal boundary layer than the observations, and near-surface potential temperature and humidity agree fairly well during the day. Moreover, a sensitivity analysis is performed to investigate dependence of the model on land surface and soil specifications, as well as atmospheric initial conditions, because they represent a major source of uncertainty in the simulation setup. It is found that an inaccurate estimation of leaf area index, albedo, or initial humidity causes a significant misrepresentation of the daytime turbulent sensible and latent heat fluxes. During the night, the boundary-layer characteristics are primarily affected by surface roughness and the applied radiation schemes.
UR - http://www.scopus.com/inward/record.url?scp=85113819342&partnerID=8YFLogxK
U2 - 10.5194/gmd-2020-197
DO - 10.5194/gmd-2020-197
M3 - Article
VL - 14
SP - 5307
EP - 5329
JO - Geoscientific Model Development
JF - Geoscientific Model Development
SN - 1991-959X
IS - 8
ER -