کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9462420 | 1313741 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Borehole temperatures, climate change and the pre-observational surface air temperature mean: allowance for hydraulic conditions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Borehole temperatures, climate change and the pre-observational surface air temperature mean: allowance for hydraulic conditions Borehole temperatures, climate change and the pre-observational surface air temperature mean: allowance for hydraulic conditions](/preview/png/9462420.png)
چکیده انگلیسی
Such analysis is based on the presumption of pure diffusive conditions in the underground. However, in real cases a certain subsurface fluid movement cannot be excluded and the measured temperature logs may contain an advective component. The paper addresses the correction for the hydraulic conditions, which may have perturbed the climate signal penetrating from the surface into the underground. The method accounts for vertical conductive and vertical advective heat transport in a 1-D horizontally layered stratum and provides a simultaneous evaluation of the POM-temperature together with the estimate of the Darcy fluid velocity. The correction strategy is illustrated on a synthetic example and its use is demonstrated on temperature logs measured in four closely spaced boreholes drilled near Tachlovice (located about 15 km SW of Prague, Czech Republic). The results revealed that in a case of moderately advectively affected subsurface conditions (fluid velocities about 10â9 m/s), the difference between POM-values assessed for a pure conductive approach and for combined vertical conductive/advective approach may amount up to 0.3-0.5 K, the value comparable with the amount usually ascribed to the 20th century climate warming.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Global and Planetary Change - Volume 45, Issue 4, March 2005, Pages 265-276
Journal: Global and Planetary Change - Volume 45, Issue 4, March 2005, Pages 265-276
نویسندگان
Louise Bodri, Vladimir Cermak,