scholarly journals An Update of U.S. Temperature Trends

2005 ◽  
Vol 18 (22) ◽  
pp. 4906-4914 ◽  
Author(s):  
Qi Qi Lu ◽  
Robert Lund ◽  
Lynne Seymour
Keyword(s):  
United States ◽  
Missing Data ◽  
Spatial Patterns ◽  
Temperature Trend ◽  
Standard Errors ◽  
Trend Study ◽  
Temperature Trends ◽  
Record Length

Abstract This note updates the temperature trend study of the contiguous 48 United States by Lund et al. for data observed during the 4-yr period 1997–2000. A parsimonious changepoint parameterization is now used, and the methods for handling missing data are improved. The number of stations with useable data has now increased from 359 to 969, thereby improving the accuracy of the reported spatial patterns in the trends. The average record length of the 969 stations is now 103 yr, with the longest record starting in 1812 and the shortest in 1926. The methodological improvements and additional 4 yr of data produce slightly smaller trend estimate standard errors. Warming is found in the Northeast, West, and northern Midwest, with slight cooling in the Southeast; overall, the trends here suggest more warming than those of the Lund et al. study.

scholarly journals Two decades of in-situ temperature measurements in the upper troposphere and lowermost stratosphere from IAGOS long-term routine observation

2017 ◽  
Author(s):  
Florian Berkes ◽  
Patrick Neis ◽  
Martin G. Schultz ◽  
Ulrich Bundke ◽  
Susanne Rohs ◽  
...  
Keyword(s):  
Weather Forecast ◽  
Global Scale ◽  
Temperature Trend ◽  
Data Set ◽  
Medium Range Weather Forecast ◽  
Upper Troposphere ◽  
Temperature Trends ◽  
Geographical Regions

Abstract. Despite several studies on temperature trends in the tropopause region, a comprehensive understanding of the evolution of temperatures in this climate-sensitive region of the atmosphere remains elusive. Here we present a unique global-scale, long-term data set of high-resolution in-situ temperature data measured aboard passenger aircraft within the European Research Infrastructure IAGOS (In-service Aircraft for a Global Observing System, www.iagos.org). This data set is used to investigate temperature trends within the global upper troposphere and lowermost stratosphere (UTLS) for the period 1995 to 2012 in different geographical regions and vertical layers of the UTLS. The largest amount of observations is available over the North Atlantic. Here, a neutral temperature trend is found within the lowermost stratosphere. This contradicts the temperature trend in the European Centre for Medium Range Weather Forecast (ECMWF) ERA-Interim reanalysis, where a significant (95 % confidence) temperature increase of +0.56 K/decade is obtained. Differences between trends derived from observations and reanalysis data can be traced back to changes in the temperature bias between observation and model data over the studied period. This study demonstrates the value of the IAGOS temperature observations as anchor point for the evaluation of reanalyses and its suitability for independent trend analyses.

Brief Report

2021 ◽  
pp. 181-196
Author(s):  
Sean G Massey ◽  
Richard E. Mattson ◽  
Mei-Hsiu Chen ◽  
Melissa Hardesty ◽  
Ann Merriwether ◽  
...  
Keyword(s):  
United States ◽  
Sexual Orientation ◽  
Emerging Adults ◽  
Emerging Adult ◽  
The United States ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Trend Study ◽  
Attraction Behavior ◽  
Survey Responses

This trend study analyzed 9 years (2011–2019) of cross-sectional survey responses to Klein’s Sexual Orientation Grid to explore changes in sexual orientation among emerging adult college students. Categorical regression models based on ordinal responses revealed that participants were moving away from exclusive heterosexuality on attraction, behavior, and identity subscales at a rate of approximately 6% per year. This trend augments for women after 2014, coinciding with increased advocacy efforts related to U.S. marriage equality, but attenuates for men. Participants’ race also related to variations in sexual orientation: Black participants were less likely than White participants to identify as exclusively heterosexual, whereas the pattern reversed for Asian participants relative to White participants. These findings suggest that changes in sexual orientation are occurring among emerging adults in the United States, potentially in response to changing social and political contexts, but these changes are more pronounced in women and Black emerging adults.

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