Identification

Title

Assimilating radar, surface and profiler data for the Sydney 2000 forecast demonstration project

Abstract

A variational scheme for the analysis of low-level wind data is presented, and its performance during a recent field experiment is described. The analysis scheme finds an optimal fit to the data and a background field under the constraints of a dry boundary layer model. The scheme was run at the Sydney 2000 Forecast Demonstration Project and assimilated data from two Doppler radars, a surface mesonet, and a boundary layer profiler. With a few exceptions, the analysis system ran reliably over the 6-month period of the project, providing wind fields every 10 min. Described herein is the performance of the system in tracking a number of different phenomena, including sea breezes, a southerly change, and the low-level convergence associated with a severe tornadic hailstorm. Finally, the analyzed wind fields are verified using independent aircraft data and compared with winds calculated by the more traditional dual-Doppler approach.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7319w2g

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2002-06-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Copyright 2002 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 of the U.S. Copyright Act or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statement, requires written permission or a license form the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/AMS) or from the AMS at 617-227-2425 or copyright@ametsoc.org

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact