Borehole Climatology: A New Method How to Reconstruct Climate

 
9780080975276: Borehole Climatology: A New Method How to Reconstruct Climate

Climate for the 21st century is expected to be considerably different from the present and recent past. Industrialization growth combined with the increasing CO2 concentration in the atmosphere and massive deforestation are well above the values over the past several decades and are expected to further grow. Air temperature is rising rapidly well as does the weather variability producing frequent extreme events. Six of the ten warmest years occurred in the 1990s. Temperatures predicted for the 21st century ranges well above the present day value. The time period of the last 100-200 years covered by the direct meteorological observations is too short and does not provide material to reliably assess what may happen over the next hundred(s) years. A faithful prediction of the future requires understanding how climate system works, i.e. to reconstruct past climate much further in the past. Borehole paleoclimatology enables climate reconstruction of the past several millennia, unlike proxy methods provides direct past temperature assessment and can well broaden the areal range to the remote regions poorly covered with meteorological observations. Considerable debates have recently focused on the causes of the present-day warming, i.e. to distinguish between the natural and anthropogenic contribution to the observed temperature increase, eventually to quantify their regional distribution. Complex interpretation of borehole data with the proxies and additional socio-economic information can hopefully help. On observed data taken in various places all over the world we demonstrate suitable examples of the interaction between the subsurface temperature response to time changes in vegetation cover, land-use (farming) and urbanization. Precise temperature-time monitoring in shallow subsurface can further provide the magnitude of the present-day warming within relatively short time intervals. As far as we know, there exists s

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Our climate has been undergoing a significant change and at present we witness a warming the rate of which is unparalleled in the recent history. Air temperature rises and the weather variability increases. If the observed warming is to continue, serious environmental consequences are unavoidable. As a consequence of the awareness of the potential social and political impacts of climate, not only scientists but many non-specialists need more and better information of what has been really happening. Knowledge of the climate evolution over the past millennium is important to understand the present warming in its long-term perspective.
Climate changes are accompanied with corresponding changes in the mean air temperature. Temperature variations penetrate downward into shallow underground and are stored here as tiny departures of the temperature field. The Earth`s subsurface presents an archive of past climate data which can be inferred by inversion of the measured temperature-depth logs. Borehole paleoclimatology enables climate reconstruction of the past several millennia and unlike proxy methods provides direct past temperature assessments.
Borehole Climatology gives an account on various methods of the paleoclimate reconstruction and on this background introduces a new method. The book explains the capacity of the subsurface temperature field to “remember” what happened on the surface and how this memory can be utilized. It explains the principles of the “geothermal” method and summarizes major results to reconstruct climate scenario spanning from Holocene to Recent. The final goal is to assess the magnitude of the present-day warming and to distinguish between the natural climate variability and the potential human contribution due to environmental pollution. The book will be useful for advanced undergraduate students and researchers in geophysical and environmental sciences. It can also provide a non-specialist introduction. The book is abundantly illustrated and completed with a list of numerous references.

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Bodri, Louise
Published by Elsevier Science
ISBN 10: 0080975275 ISBN 13: 9780080975276
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