التفاصيل البيبلوغرافية
| العنوان: |
North American regional climate reconstruction from ground surface temperature histories. |
| المؤلفون: |
Jaume-Santero, Fernando, Pickler, Carolyne, Beltrami, Hugo, Mareschal, Jean-Claude |
| المصدر: |
Climate of the Past; 2016, Vol. 12 Issue 12, p2181-2194, 14p |
| مصطلحات موضوعية: |
CLIMATE reconstruction (Research), CLIMATE change, SURFACE temperature, ECOLOGICAL disturbances, MONTE Carlo method |
| مستخلص: |
Within the framework of the PAGES NAm2k project, 510 North American borehole temperature-depth profiles were analyzed to infer recent climate changes. To facilitate comparisons and to study the same time period, the profiles were truncated at 300 m. Ground surface temperature histories for the last 500 years were obtained for a model describing temperature changes at the surface for several climate-differentiated regions in North America. The evaluation of the model is done by inversion of temperature perturbations using singular value decomposition and its solutions are assessed using a Monte Carlo approach. The results within 95% confidence interval suggest a warming between 1.0 and 2.5K during the last two centuries. A regional analysis, composed of mean temperature changes over the last 500 years and geographical maps of ground surface temperatures, show that all regions experienced warming, but this warming is not spatially uniform and is more marked in northern regions. [ABSTRACT FROM AUTHOR] |
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