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Title: Effect of Surface Heterogeneity on the Boundary-Layer Height: A Case Study at a Semi-Arid Forest

Abstract

Here, we investigate the effects of an isolated meso-$$\gamma$$-scale surface heterogeneity for roughness and albedo on the atmospheric boundary-layer (ABL) height, with a case study at a semi-arid forest surrounded by sparse shrubland (forest area: 28 km 2, forest length in the main wind direction: 7 km). Doppler lidar and ceilometer measurements at this semi-arid forest show an increase in the ABL height over the forest compared with the shrubland on four out of eight days. The differences in the ABL height between shrubland and forest are explained for all days with a model that assumes a linear growth of the internal boundary layer of the forest through the convective ABL upwind of the forest followed by a square-root growth into the stable free atmosphere. For the environmental conditions that existed during our measurements, the increase in ABL height due to large sensible heat fluxes from the forest (600 W~m -2 in summer) is subdued by stable stratification in the free atmosphere above the ABL, or reduced by high wind speeds in the mixed layer.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1];  [1];  [3];  [3];  [3];  [3];  [3];  [3];  [1]
  1. Karlsruhe Inst. of Technology (KIT) Garmisch-Partenkirchen (Germany). Inst. of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU)
  2. Karlsruhe Inst. of Technology (KIT) Garmisch-Partenkirchen (Germany). Inst. of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Weizmann Inst. of Science, Rehovot (Israel). Dept. of Earth and Planetary Sciences and Faculty of Chemistry
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE; German Research Foundation (DFG); Helmholtz Association of German Research Centres; Israel Science Foundation (ISF); Jewish National Fund Keren Kayemet Leisrael (JNF-KKL)
OSTI Identifier:
1467258
Report Number(s):
[LA-UR-17-22652]
[Journal ID: ISSN 0006-8314]
Grant/Contract Number:  
[AC52-06NA25396; YA 274/1-1; SCHM 2736/2-1; VH-NG-834]
Resource Type:
Accepted Manuscript
Journal Name:
Boundary-Layer Meteorology
Additional Journal Information:
[ Journal Volume: 169; Journal Issue: 2]; Journal ID: ISSN 0006-8314
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Boundary-Layer Height; Surface Heterogeneity; Forests; LiDAR; Eddy-Covariance; Internal boundary layer

Citation Formats

Brugger, Peter, Banerjee, Tirtha, De Roo, Frederik, Kröniger, Konstantin, Qubaja, Rafat, Rohatyn, Shani, Rotenberg, Eyal, Tatarinov, Feodor, Yakir, Dan, Yang, Fulin, and Mauder, Matthias. Effect of Surface Heterogeneity on the Boundary-Layer Height: A Case Study at a Semi-Arid Forest. United States: N. p., 2018. Web. doi:10.1007/s10546-018-0371-5.
Brugger, Peter, Banerjee, Tirtha, De Roo, Frederik, Kröniger, Konstantin, Qubaja, Rafat, Rohatyn, Shani, Rotenberg, Eyal, Tatarinov, Feodor, Yakir, Dan, Yang, Fulin, & Mauder, Matthias. Effect of Surface Heterogeneity on the Boundary-Layer Height: A Case Study at a Semi-Arid Forest. United States. doi:10.1007/s10546-018-0371-5.
Brugger, Peter, Banerjee, Tirtha, De Roo, Frederik, Kröniger, Konstantin, Qubaja, Rafat, Rohatyn, Shani, Rotenberg, Eyal, Tatarinov, Feodor, Yakir, Dan, Yang, Fulin, and Mauder, Matthias. Fri . "Effect of Surface Heterogeneity on the Boundary-Layer Height: A Case Study at a Semi-Arid Forest". United States. doi:10.1007/s10546-018-0371-5. https://www.osti.gov/servlets/purl/1467258.
@article{osti_1467258,
title = {Effect of Surface Heterogeneity on the Boundary-Layer Height: A Case Study at a Semi-Arid Forest},
author = {Brugger, Peter and Banerjee, Tirtha and De Roo, Frederik and Kröniger, Konstantin and Qubaja, Rafat and Rohatyn, Shani and Rotenberg, Eyal and Tatarinov, Feodor and Yakir, Dan and Yang, Fulin and Mauder, Matthias},
abstractNote = {Here, we investigate the effects of an isolated meso-$\gamma$-scale surface heterogeneity for roughness and albedo on the atmospheric boundary-layer (ABL) height, with a case study at a semi-arid forest surrounded by sparse shrubland (forest area: 28 km2, forest length in the main wind direction: 7 km). Doppler lidar and ceilometer measurements at this semi-arid forest show an increase in the ABL height over the forest compared with the shrubland on four out of eight days. The differences in the ABL height between shrubland and forest are explained for all days with a model that assumes a linear growth of the internal boundary layer of the forest through the convective ABL upwind of the forest followed by a square-root growth into the stable free atmosphere. For the environmental conditions that existed during our measurements, the increase in ABL height due to large sensible heat fluxes from the forest (600 W~m-2 in summer) is subdued by stable stratification in the free atmosphere above the ABL, or reduced by high wind speeds in the mixed layer.},
doi = {10.1007/s10546-018-0371-5},
journal = {Boundary-Layer Meteorology},
number = [2],
volume = [169],
place = {United States},
year = {2018},
month = {6}
}

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    Works referencing / citing this record:

    Effect of Secondary Circulations on the Surface–Atmosphere Exchange of Energy at an Isolated Semi-arid Forest
    journal, July 2018

    • Kröniger, Konstantin; De Roo, Frederik; Brugger, Peter
    • Boundary-Layer Meteorology, Vol. 169, Issue 2
    • DOI: 10.1007/s10546-018-0370-6