Quality Control of High Intensity Climate Data in Alaska
Abstract
Surface meteorological data from more than 200 stations in a variety of observing networks and various stand-alone projects were obtained for the MMS Beaufort and Chukchi Seas Modeling Study (Phase II). Many of these datasets were obtained for Phase I of this project; however some stations are new because of the domain expansion in Phase II. All available meteorological data for the period January 1, 1979 to December 31, 2009 were obtained. Most of these stations have hourly measurements of some variables while some stations have sub-hourly measurements such as 6-minute data at Atqasuk and Barrow. At beginning, the traditional quality control QC methods such as threshold test, step change test, and persistence test were applied to QC the high intensity dataset with parameters obtained from the data as those obtained for daily time series. However, these methods flagged too many data entries because the parameters for sub-hourly data are inadequate. Improvements were then developed on the basis of daily time series to obtain the proper limits for QC of the hourly data. The improved QC procedures are able to identify the susceptible data in the dataset whiling having much fewer Type II errors by flagged fewer good data as outliers. The QC'd dataset will provide more confidence to the users in researches such as climate analysis and climate modeling.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.A33A0173Y
- Keywords:
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- Data Assimilation