High-resolution humidity profiles retrieved from wind profiler radar measurements
-
Published:2018-03-26
Issue:3
Volume:11
Page:1669-1688
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Saïd Frédérique,Campistron Bernard,Di Girolamo Paolo
Abstract
Abstract. The retrieval of humidity profiles from wind profiler radars has already been
documented in the past 30 years and is known to be neither as straightforward
and nor as robust as the retrieval of the wind velocity. The main constraint
to retrieve the humidity profile is the necessity to combine measurements
from the wind profiler and additional measurements (such as observations from
radiosoundings at a coarser time resolution). Furthermore, the method relies
on some assumptions and simplifications that restrict the scope of its
application. The first objective of this paper is to identify the obstacles
and limitations and solve them, or at least define the field of
applicability. To improve the method, we propose using the radar capacity to
detect transition levels, such as the top level of the boundary layer, marked
by a maximum in the radar reflectivity. This forces the humidity profile from
the free troposphere and from the boundary layer to coincide at this level,
after an optimization of the calibration coefficients, and reduces the error.
The resulting mean bias affecting the specific humidity profile never exceeds
0.25 g kg−1. The second objective is to explore the capability of the
algorithm to retrieve the humidity vertical profiles for an operational
purpose by comparing the results with observations from a Raman lidar.
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference42 articles.
1. Angevine, W. M., White, A. B., and Avery, S. K.: Boundary-layer depth and
entrainment zone characterization with a boundary-layer profiler,
Bound.-Lay. Meteorol., 68, 375–385, 1994. a 2. Atlas, D., Srivastava, R., and Sekhon, R.: Doppler radar characteristics of
precipitation at vertical incidence, Rev. Geophys. Space Ge., 11, 1–35,
1973. a 3. Bianco, L., Cimini, D., Marzano, F. S., and Ware, R.: Combining Microwave
Radiometer and Wind Profiler Radar Measurements for High-Resolution
Atmospheric Humidity Profiling, J. Atmos. Ocean. Tech., 22, 949–965, https://doi.org/10.1175/JTECH1771.1,
2005. a, b 4. Campistron, B. and Réchou, A.: Rain kinetic energy measurement with a UHF wind
profiler, 13th workshop on Technical and Scientific Aspects of MST Radar
(MST13), Kühlungsborn, 19–23 March, Germany, 2012. a 5. Campistron, B., Saïd, F., Delbarre, H., Augustin, P., and Lambert, D.: Rain
Profiling with a UHF Wind Profiler and its Application to Soil Erosion
Study, HyMeX 7th international conference, Cassis, France, 2013. a, b
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|