کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6427786 | 1634725 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mean annual temperature in New Zealand during the last glacial maximum derived from dissolved noble gases in groundwater
ترجمه فارسی عنوان
متوسط دمای سالانه در نیوزیلند در طول آخرین حداکثر یخبندان مشتق شده از گازهای نجیب حل شده در آب های زیرزمینی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
This study presents a reconstruction of mean annual surface temperature in New Zealand over the last glacial period using groundwater noble gas paleothermometry. Low resolution 14C-derived mean recharge ages of groundwater from the Deep Moutere, Deep Wairau, and Taranaki aquifers range from roughly 41,500 yr to present, including the last glacial maximum (LGM). Modeled noble gas temperatures of probable glacial-age samples range from roughly 3.7-6.2â°C cooler than present. We present an error-weighted mean cooling of 4.6±0.5°C relative to present during last glacial period. The screened depth intervals of some wells sampled in this study allow for a degree of mixing during extraction between groundwater layers of different recharge age. Mixing with modern groundwater may slightly elevate the noble gas temperatures (NGTs) of glacial-age samples while making them appear substantially younger. Given the uncertainty in dating, we cannot rule out a larger LGM temperature depression of up to â¼6â°C. The â¼4.6â°C cooling estimate agrees with a number of terrestrial paleoclimate reconstructions near the study area as well as the majority of nearby paleoceanographic temperature studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 431, 1 December 2015, Pages 206-216
Journal: Earth and Planetary Science Letters - Volume 431, 1 December 2015, Pages 206-216
نویسندگان
A.M. Seltzer, M. Stute, U. Morgenstern, M.K. Stewart, J.M. Schaefer,