Arctic System Reanalysis: Notes, Questions, and Discussion

Submitted by mapr8844 on Wed, 08/17/2016 - 13:06

Arctic System Reanalysis: Notes, Questions, and Discussion
 

Quick overview and useful links

 

General Reanalysis Notes, Questions, and Discussion

George Victor (not verified)

Fri, 03/12/2021 - 09:48

Hi,

I'm George Victor, a student at Uppsala University, Sweden. I'm interested in using the arctic system reanalysis (15km) dataset for wave model simulations.

For my study, I expect to have a regular rectangular grid data. However, since ASR data is not based on regular rectangular projection, I'd like to know what projection is it based on. I'd also be grateful if you could suggest me some tools to convert the  data to rectrangular  projection. Thank you

The information below deals with the projection question. Regret I cannot assist with the tool query. If George Victor contacts us directly and provides more information, we may be able to direct him to the necessary software.

Dave Bromwich, Ohio State University. bromwich.1@osu.edu

The WPS parameter for ASRv2 that uses the Advanced Research WRF (ARW):

    The projection is polar stereographic.

    The true latitude is 60N.

    The domain center latitude is 90N and standard longitude is -175E.

 REF_LAT= 90N : A real value specifying the latitude part of a (latitude, longitude) location whose (i,j) location in the simulation domain is known. For ARW, ref_lat gives the latitude of the center-point of the coarse domain by default (i.e., when ref_x and ref_y are not specified).

REF_LON=-175E : A real value specifying the longitude part of a (latitude, longitude) location whose (i, j) location in the simulation domain is known. For ARW, ref_lon gives the longitude of the center-point of the coarse domain by default (i.e., when ref_x and ref_y are not specified). West longitudes are negative, and the value of ref_lon should be in the range [-180, 180]. 

STAND_LON=-175E : A real value specifying, for ARW, the longitude that is parallel with the y-axis in the Lambert conformal and polar stereographic projections. For the regular latitude-longitude projection, this value gives the rotation about the earth's geographic poles. 

The WRF Preprocessing System (WPS) document:

https://www2.mmm.ucar.edu/wrf/users/docs/user_guide_v4/v4.0/users_guide_chap3.html

Add new comment

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.