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Statistically Downscaled Wind and Humidity from the ERA-5 and MERRA-2 Reanalysis over California and Nevada from 1979-2019

Metadata Updated: November 29, 2024

Statistical downscaling methodology was applied to global atmosphere reanalysis, using a 10 year dynamical modeled output as training data, to extend a record of wind and humidity back through the satellite era beginning 1979 or 1980. To extend the record of weather to cover a longer period and thus a greater number of significant fire weather events, statistical downscaling was implemented using the Localized Constructed Analogs (LOCA) statistical downscaling technique. LOCA is computationally efficient and has been designed to better simulate extreme events and spatial weather structure than previous statistical downscaling. The output hourly 3 km spatial resolution data covering the California and Nevada region was downscaled from each of the two global atmospheric reanalyses: a) the ERA5 Reanalysis covering January 1979 through December 2019; b) the MERRA2 Reanalysis covering January 1980 through December 2018. These two reanalyses, ERA5 and MERRA2, are acknowledged to provide high quality, dynamically-consistent representations of historical global weather. The time resolution was extended from daily to hourly time samples, given the 10 years of hourly, 2km WRF dynamical model historical simulation from 2004-2013 supplied by co-investigator Tim Brown and colleagues at Desert Research Institute, called the “DRI-WRF” dataset. The LOCA dataset was generated over California and Nevada for each hour of 1979-2019, the satellite era that comprises the ERA5 Reanalysis. In the LOCA downscaling process, cross validation tests were employed to evaluate LOCA performance in simulating winds and humidity, especially in cases of extreme high winds and low humidity that are particularly important in this fire weather application. The LOCA downscaled winds and humidity were supplied to co-PIs of this project for their investigation of daily weather influences on wildfire in California.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date November 29, 2024
Metadata Updated Date November 29, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date November 29, 2024
Metadata Updated Date November 29, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/21eb18b58c270660870fb5e3be5ffc7d
Identifier USGS:62698a7dd34e76103cd09c42
Data Last Modified 20241127
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datainventory.doi.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 7271a65e-e5b5-4e29-8938-542e35d667f3
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -125.234,31.5156,-112.641,43.7969
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash c108375df753af95499c53fcf7469ef2b52279099189174c2ffd9b7c974c76b6
Source Schema Version 1.1
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