Abstract
This study determined the theoretical time-to-detect (TTD) global climate model (GCM) precipitable water vapor (PWV) 100-yr trends when realisticmeasurement errors are considered.Global trends ranged from 0.055 to 0.072mmyr-1 and varied minimally from season to season. Global TTDs with a 0% measurement error ranged from3.0 to 4.8 yr,while a 5%measurement error increased the TTDby almost 6 times, ranging from17.6 to 22.0 yr. Zonal trends were highest near the equator however, zonal TTDs were nearly independent of latitude when 5% measurement error was included. Zonal TTDs are significantly reduced when the trends are analyzed by season.Regional trends (15° × 30°) show TTDs close to those in the 158 latitude zones (15° × 360°). Detailed case study analysis of four selected regions with high population density-eastern United States, Europe, China, and India-indicated that trend analysis on regional spatial scales may provide the most timely information regarding highly populated regions when comparing detection time scales to global and zonal analyses.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 8259-8275 |
| Number of pages | 17 |
| Journal | Journal of Climate |
| Volume | 27 |
| Issue number | 21 |
| DOIs | |
| State | Published - Jan 1 2014 |
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All Science Journal Classification (ASJC) codes
- Atmospheric Science
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Time-to-detect trends in precipitable water vapor with varying measurement error. / Roman, Jacola Ann; Knuteson, Robert; Ackerman, Steve.
In: Journal of Climate, Vol. 27, No. 21, 01.01.2014, p. 8259-8275.Research output: Contribution to journal › Article
TY - JOUR
T1 - Time-to-detect trends in precipitable water vapor with varying measurement error
AU - Roman, Jacola Ann
AU - Knuteson, Robert
AU - Ackerman, Steve
PY - 2014/1/1
Y1 - 2014/1/1
N2 - This study determined the theoretical time-to-detect (TTD) global climate model (GCM) precipitable water vapor (PWV) 100-yr trends when realisticmeasurement errors are considered.Global trends ranged from 0.055 to 0.072mmyr-1 and varied minimally from season to season. Global TTDs with a 0% measurement error ranged from3.0 to 4.8 yr,while a 5%measurement error increased the TTDby almost 6 times, ranging from17.6 to 22.0 yr. Zonal trends were highest near the equator however, zonal TTDs were nearly independent of latitude when 5% measurement error was included. Zonal TTDs are significantly reduced when the trends are analyzed by season.Regional trends (15° × 30°) show TTDs close to those in the 158 latitude zones (15° × 360°). Detailed case study analysis of four selected regions with high population density-eastern United States, Europe, China, and India-indicated that trend analysis on regional spatial scales may provide the most timely information regarding highly populated regions when comparing detection time scales to global and zonal analyses.
AB - This study determined the theoretical time-to-detect (TTD) global climate model (GCM) precipitable water vapor (PWV) 100-yr trends when realisticmeasurement errors are considered.Global trends ranged from 0.055 to 0.072mmyr-1 and varied minimally from season to season. Global TTDs with a 0% measurement error ranged from3.0 to 4.8 yr,while a 5%measurement error increased the TTDby almost 6 times, ranging from17.6 to 22.0 yr. Zonal trends were highest near the equator however, zonal TTDs were nearly independent of latitude when 5% measurement error was included. Zonal TTDs are significantly reduced when the trends are analyzed by season.Regional trends (15° × 30°) show TTDs close to those in the 158 latitude zones (15° × 360°). Detailed case study analysis of four selected regions with high population density-eastern United States, Europe, China, and India-indicated that trend analysis on regional spatial scales may provide the most timely information regarding highly populated regions when comparing detection time scales to global and zonal analyses.
UR - http://www.scopus.com/inward/record.url?scp=84916231126&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84916231126&partnerID=8YFLogxK
U2 - 10.1175/JCLI-D-13-00736.1
DO - 10.1175/JCLI-D-13-00736.1
M3 - Article
AN - SCOPUS:84916231126
VL - 27
SP - 8259
EP - 8275
JO - Journal of Climate
JF - Journal of Climate
SN - 0894-8755
IS - 21
ER -