کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1044844 944689 2006 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recent rainfall and runoff variability in central Argentina
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Recent rainfall and runoff variability in central Argentina
چکیده انگلیسی

Laguna Mar Chiquita, a closed, shallow, hypersaline lake in central Argentina (∼30–31°S, 62–63°W), is a sensitive marker of high- and low-frequency changes in regional hydrology and, therefore, of climatic changes at middle latitudes in southeastern South America. Its drainage basin and neighboring areas, including the Sierras Pampeanas de Córdoba, and Sierra del Aconquija (27–33°S, 62–66°W), are under the influence of diverse climate drivers that determine a complex behavior in rainfall and runoff dynamics. Statistical (Mann–Kendall and seasonal Kendall trend tests) and spectral analyses (Fourier and wavelet transform) of the available data show that: (a) there is significant evidence that rainfall has increased in the region since the 2nd half of the 20th century; (b) concurrently, runoff has also increased, particularly in the northern tributaries (north of 31°S) of Mar Chiquita; (c) northern rainfall and discharge records mostly exhibit an apparent near-decadal (also near-bidecadal in runoff) climatic signature; and d) the ENSO influence on rainfall appears faint but discernible in the southern (south of ∼31°S) portion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary International - Volume 158, Issue 1, December 2006, Pages 127–139
نویسندگان
, , , ,