نتایج جستجو برای: mountain climate

تعداد نتایج: 193911  

Journal: :The Journal of allergy and clinical immunology 2008
James W Hurrell

79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 O R R E C My wife and children have allergies and asthma. From time to time, we discuss whether their discomfort is worsening. One reason to believe this to be the case is the reality of anthropogenic climate change. As discussed elsewhere in this theme issue (eg, Shea et al), firm links have been established...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2000
R B Alley

Ice-core records show that climate changes in the past have been large, rapid, and synchronous over broad areas extending into low latitudes, with less variability over historical times. These ice-core records come from high mountain glaciers and the polar regions, including small ice caps and the large ice sheets of Greenland and Antarctica.

2012
Johannes Staehelin Ted Shepherd Greg Bodeker

Cirrus clouds above Zurich's local mountain Uetliberg (871m). Cirrus clouds exist in the upper troposphere, at altitudes between 7 and 17 km. Because cirrus clouds cover up to 30% of the Earth surface they play an important role in atmospheric chemistry and climate (photo: SPARC Office; feel free to provide photos for future SPARC newsletters).

2011
E. I. Khlebnikova

This chapter gives a brief analysis of basic factors influencing highland climates and peculiarities of atmospheric circulation caused by mountain systems. Special attention is paid to characteristics of highland climate which are manifested in regimes of temperature, precipitation, wind, solar radiation, etc. Typical and exclusive features of highland climates in different large-scale climatic...

2012
Stefan Dullinger Andreas Gattringer Wilfried Thuiller Dietmar Moser Niklaus E. Zimmermann Antoine Guisan Wolfgang Willner Christoph Plutzar Michael Leitner Thomas Mang Marco Caccianiga Thomas Dirnböck Siegrun Ertl Anton Fischer Jonathan Lenoir Jens-Christian Svenning Achilleas Psomas Dirk R. Schmatz Urban Silc Pascal Vittoz Karl Hülber

Quantitative estimates of the range loss of mountain plants under climate change have so far mostly relied on static geographical projections of species’ habitat shifts1–3. Here, we use a hybrid model4 that combines such projections with simulations of demography and seed dispersal to forecast the climate-driven spatio-temporal dynamics of 150 highmountain plant species across the European Alps...

2012
Xin-Ju Xiao Ke-Wei Liu Yu-Yun Zheng Yu-Ting Zhang Wen-Chieh Tsai Yu-Yun Hsiao Guo-Qiang Zhang Li-Jun Chen Zhong-Jian Liu

BACKGROUND In the past century, the global average temperature has increased by approximately 0.74°C and extreme weather events have become prevalent. Recent studies have shown that species have shifted from high-elevation areas to low ones because the rise in temperature has increased rainfall. These outcomes challenge the existing hypothesis about the responses of species to climate change. ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Clifford S Riebe Leonard S Sklar Claire E Lukens David L Shuster

Weathering on mountain slopes converts rock to sediment that erodes into channels and thus provides streams with tools for incision into bedrock. Both the size and flux of sediment from slopes can influence channel incision, making sediment production and erosion central to the interplay of climate and tectonics in landscape evolution. Although erosion rates are commonly measured using cosmogen...

Journal: رستنیها 2013

The steppe parts of Lissar protected area is located in the North Western part of Talesh mountain range, with an area around 13,500 hectares. The area is influenced by a humidCaspian climate at the Eastern slope and a cold mountain Irano-Turanian-like climate at the Western slope causing the formation of diverse vegetation types. Based on a collection of about 1,250 specimens during 2007–08, a ...

Journal: :Ambio 2009
Sofie Sjögersten Philip A Wookey

Changes in temperature and moisture resulting from climate change are likely to strongly modify the ecosystem carbon sequestration capacity in high-latitude areas, both through vegetation shifts and via direct warming effects on photosynthesis and decomposition. This paper offers a synthesis of research addressing the potential impacts of climate warming on soil processes and carbon fluxes at t...

2014
Baoming Du Chunjiang Liu Hongzhang Kang Penghua Zhu Shan Yin Guangrong Shen Jingli Hou Hannu Ilvesniemi

Decreasing temperature and increasing precipitation along altitude gradients are typical mountain climate in subtropical China. In such a climate regime, identifying the patterns of the C stable isotope composition (δ(13)C) in plants and soils and their relations to the context of climate change is essential. In this study, the patterns of δ(13)C variation were investigated for tree leaves, lit...

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