کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4463304 1621639 2016 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reconstruction of biological drought conditions during the past 2847 years in an alpine environment of the northeastern Tibetan Plateau, China, and possible linkages to solar forcing
ترجمه فارسی عنوان
بازسازی شرایط خشکسالی بیولوژیکی در طول 2847 سال گذشته در یک محیط کوهستانی از فلات تبت در شمال شرقی چین و ارتباط امکان پذیر با نیروی خورشیدی
کلمات کلیدی
عرض حلقه درخت؛ خشکسالی؛ فلات تبت در شمال شرقی؛ مدل سازی تعادل آب
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• An in situ biological drought index was developed using water-balance modeling and geographic information systems.
• Drought history of northeastern Tibetan Plateau was reconstructed back to 843 BCE based on a tree-ring chronology.
• Drought variability in northeastern Tibetan Plateau was closely related to the 210-year de Vries solar cycle since 1300 CE.

In this study we reconstructed the moisture condition of the eastern Qaidam Basin of the northeastern Tibetan Plateau based on a 3585-year tree ring chronology. The growth environment of Qilian juniper (Sabina przewalskii Kom.) on the mountains in the eastern Qaidam Basin was first determined by comparing precipitation and temperature estimates from two spatial datasets (PRISM and World Climate). Moisture balance was calculated as the sum of simulated moisture deficit (negative) and surplus using a modified Thornthwaite water balance model, and used as a proxy of biological drought conditions. Using data during 1956–2005, we established the transfer function to reconstruct a 2847-year series of January–June moisture balance (843 BCE–2004 CE). With an adjusted R2 value of 0.654 of the transfer function and strong performance in validation, the reconstructed January–June moisture balance can be considered an excellent indicator of biological drought conditions for the study region. The reconstructed series showed strong correlations with reconstructed PDSI in the monsoon Asian region, representing a region of 10° latitudes by 20° longitudes. Using the reconstructed series, we identified centennial-scale dry periods since 843 BCE: 381–277 BCE, 425–520 CE, 1108–1212 CE, 1428–1516 CE, and 1634–1743 CE. Additionally it had statistically significant negative correlations with a monsoon intensity proxy based on oxygen stable isotope from southwestern China (Dongge Cave). Further analyses identified significant relationships with solar activity, especially during the last 700 years. We confirmed the ~ 200-year cyclic pattern in the reconstructed moisture balance series, which matched the known 210-year de Vries solar cycle and peaked during the Little Ice Age. However, the cyclic patterns of the reconstructed moisture balance series and solar activity were decoupled for the period prior to approx. 1300 CE.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Global and Planetary Change - Volume 143, August 2016, Pages 214–227
نویسندگان
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