scholarly journals Reconciling observed and modeled temperature and precipitation trends over Europe by adjusting for circulation variability

2016 ◽  
Vol 43 (15) ◽  
pp. 8189-8198 ◽  
Author(s):  
Claudio Saffioti ◽  
Erich M. Fischer ◽  
Simon C. Scherrer ◽  
Reto Knutti
Keyword(s):  
Temperature And Precipitation ◽  
Precipitation Trends

scholarly journals Climatic Trends in Different Bioclimatic Zones in the Chitwan Annapurna Landscape, Nepal

Climate ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 136
Author(s):  
Dol Raj Luitel ◽  
Pramod K. Jha ◽  
Mohan Siwakoti ◽  
Madan Lall Shrestha ◽  
Rangaswamy Munniappan
Keyword(s):  
Climate Change ◽  
Time Series Data ◽  
Lapse Rate ◽  
Series Data ◽  
Average Temperature ◽  
Temperature And Precipitation ◽  
Average Annual Temperature ◽  
Bioclimatic Zone ◽  
The Impact ◽  
Precipitation Trends

The Chitwan Annapurna Landscape (CHAL) is the central part of the Himalayas and covers all bioclimatic zones with major endemism of flora, unique agro-biodiversity, environmental, cultural and socio-economic importance. Not much is known about temperature and precipitation trends along the different bioclimatic zones nor how changes in these parameters might impact the whole natural process, including biodiversity and ecosystems, in the CHAL. Analysis of daily temperature and precipitation time series data (1970–2019) was carried out in seven bioclimatic zones extending from lowland Terai to the higher Himalayas. The non-parametric Mann-Kendall test was applied to determine the trends, which were quantified by Sen’s slope. Annual and decade interval average temperature, precipitation trends, and lapse rate were analyzed in each bioclimatic zone. In the seven bioclimatic zones, precipitation showed a mixed pattern of decreasing and increasing trends (four bioclimatic zones showed a decreasing and three bioclimatic zones an increasing trend). Precipitation did not show any particular trend at decade intervals but the pattern of rainfall decreases after 2000AD. The average annual temperature at different bioclimatic zones clearly indicates that temperature at higher elevations is increasing significantly more than at lower elevations. In lower tropical bioclimatic zone (LTBZ), upper tropical bioclimatic zone (UTBZ), lower subtropical bioclimatic zone (LSBZ), upper subtropical bioclimatic zone (USBZ), and temperate bioclimatic zone (TBZ), the average temperature increased by 0.022, 0.030, 0.036, 0.042 and 0.051 °C/year, respectively. The decade level temperature scenario revealed that the hottest decade was from 1999–2009 and average decade level increases of temperature at different bioclimatic zones ranges from 0.2 to 0.27 °C /decade. The average temperature and precipitation was found clearly different from one bioclimatic zone to other. This is the first time that bioclimatic zone level precipitation and temperature trends have been analyzed for the CHAL. The rate of additional temperature rise at higher altitudes compared to lower elevations meets the requirements to mitigate climate change in different bioclimatic zones in a different ways. This information would be fundamental to safeguarding vulnerable communities, ecosystem and relevant climate-sensitive sectors from the impact of climate change through formulation of sector-wise climate change adaptation strategies and improving the livelihood of rural communities.

scholarly journals Evaluation of Temperature and Precipitation Trends and Long-Term Persistence in CMIP5 Twentieth-Century Climate Simulations

2013 ◽  
Vol 26 (12) ◽  
pp. 4168-4185 ◽  
Author(s):  
Sanjiv Kumar ◽  
Venkatesh Merwade ◽  
James L. Kinter ◽  
Dev Niyogi
Keyword(s):  
Twentieth Century ◽  
Climate Models ◽  
Coupled Model ◽  
Research Unit ◽  
Trend Detection ◽  
Climatic Research Unit ◽  
Multimodel Ensemble ◽  
Temperature And Precipitation ◽  
Precipitation Trends

Abstract The authors have analyzed twentieth-century temperature and precipitation trends and long-term persistence from 19 climate models participating in phase 5 of the Coupled Model Intercomparison Project (CMIP5). This study is focused on continental areas (60°S–60°N) during 1930–2004 to ensure higher reliability in the observations. A nonparametric trend detection method is employed, and long-term persistence is quantified using the Hurst coefficient, taken from the hydrology literature. The authors found that the multimodel ensemble–mean global land–average temperature trend (0.07°C decade−1) captures the corresponding observed trend well (0.08°C decade−1). Globally, precipitation trends are distributed (spatially) at about zero in both the models and in the observations. There are large uncertainties in the simulation of regional-/local-scale temperature and precipitation trends. The models’ relative performances are different for temperature and precipitation trends. The models capture the long-term persistence in temperature reasonably well. The areal coverage of observed long-term persistence in precipitation is 60% less (32% of land area) than that of temperature (78%). The models have limited capability to capture the long-term persistence in precipitation. Most climate models underestimate the spatial variability in temperature trends. The multimodel ensemble–average trend generally provides a conservative estimate of local/regional trends. The results of this study are generally not biased by the choice of observation datasets used, including Climatic Research Unit Time Series 3.1; temperature data from Hadley Centre/Climatic Research Unit, version 4; and precipitation data from Global Historical Climatology Network, version 2.

Temperature and Precipitation Trends in Canada During the 20th Century

2019 ◽  
pp. 40-60
Author(s):  
Xuebin Zhang ◽  
Lucie A. Vincent ◽  
W.D. Hogg ◽  
Ain Niitsoo
Keyword(s):  
20Th Century ◽  
Temperature And Precipitation ◽  
Precipitation Trends

scholarly journals Seasonal Climate Trends, the North Atlantic Oscillation, and Salamander Abundance in the Southern Appalachian Mountain Region

2010 ◽  
Vol 49 (8) ◽  
pp. 1597-1603 ◽  
Author(s):  
Robert J. Warren ◽  
Mark A. Bradford
Keyword(s):  
North Atlantic Oscillation ◽  
North Atlantic ◽  
The North ◽  
Temperature And Precipitation ◽  
Southern Appalachian ◽  
Southern Appalachian Mountain ◽  
The North Atlantic ◽  
The North Atlantic Oscillation ◽  
Precipitation Trends

Abstract The North Atlantic Oscillation (NAO) is a large-scale climate teleconnection that coincides with worldwide changes in weather. Its impacts have been documented at large scales, particularly in Europe, but not as much at regional scales. Furthermore, despite documented impacts on ecological dynamics in Europe, the NAO’s influence on North American biota has been somewhat overlooked. This paper examines long-term temperature and precipitation trends in the southern Appalachian Mountain region—a region well known for its biotic diversity, particularly in salamander species—and examines the connections between these trends and NAO cycles. To connect the NAO phase shifts with southern Appalachian ecology, trends in stream salamander abundance are also examined as a function of the NAO index. The results reported here indicate no substantial long-term warming or precipitation trends in the southern Appalachians and suggest a strong relationship between cool season (November–April) temperature and precipitation and the NAO. More importantly, trends in stream salamander abundance are best explained by variation in the NAO as salamanders are most plentiful during the warmer, wetter phases.

Temperature and precipitation trends in Bologna (Italy) from 1952 to 1999

2002 ◽  
Vol 61 (3) ◽  
pp. 203-214 ◽  
Author(s):  
F. Ventura ◽  
P. Rossi Pisa ◽  
E. Ardizzoni
Keyword(s):  
Temperature And Precipitation ◽  
Precipitation Trends

scholarly journals Modelled glacier response to centennial temperature and precipitation trends on the Antarctic Peninsula

2014 ◽  
Vol 4 (11) ◽  
pp. 993-998 ◽  
Author(s):  
Bethan J. Davies ◽  
Nicholas R. Golledge ◽  
Neil F. Glasser ◽  
Jonathan L. Carrivick ◽  
Stefan R. M. Ligtenberg ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Temperature And Precipitation ◽  
The Antarctic ◽  
Precipitation Trends
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