منابع مشابه
A 2000 year varve - based climate record from the central Brooks Range , Alaska
Varved minerogenic sediments from glacial-fed Blue Lake, northern Alaska, are used to investigate late Holocene climate variability. Varvethickness measurements track summer temperature recorded at Atigun Pass, located 41 km east at a similar elevation (r = 0.31, P = 0.08). Results indicate that climate in the Brooks Range from 10 to 730 AD (varve year) was warm with precipitation inferred to b...
متن کاملComparison of varve and C chronologies from Steel Lake, Minnesota, USA
Annually laminated sediments (varves) offer an effective means of acquiring high-quality palaeoenvironmental records. However, the strength of a varve chronology can be compromised by a number of factors, such as missing varves, ambiguous laminations and human counting error. We assess the quality of a varve chronology for the last three millennia from Steel Lake, Minnesota, through comparisons...
متن کاملمفهوم نظارت در اصل 99 قانون اساسی
قانون اساسی مهمترین سند و میثاق مدون ملی است که عمل به آن در راستای تضمین منافع ملت و آحاد مردم با نظم و امنیتی که در رابطه افراد بایکدیگر، دولت نسبت به مردم و مردم نسبت به دولت ایجاد می‌نماید، ضروری و غیر قابل مناقشه است. از این جهت فهم دقیق اصول این قانون و مفاهیم به کار گرفته شده در آن ضرورتی بسیار می‌یابد. چه آنکه هر گونه برداشت و تفسیری که منطبق با روح و متن قانون اساسی نباشد تحقق آرمان نظ...
متن کاملLimnological and sedimentary processes at Sawtooth Lake, Canadian High Arctic, and their influence on varve formation
This paper synthesizes data collected to document the modern limnological and sedimentary processes in South Sawtooth Lake located on northern Ellesmere Island, Nunavut, Canada. Field observations show that the finely laminated sediments deposited in the distal basin are formed by the settling of overflows and interflows, and in rare occasions, by non-erosive hyperconcentrated density flows. Th...
متن کاملVarve and radiocarbon dating support the rapid advance of Jakobshavn Isbr during the Little Ice Age
Large outlet glaciers draining the Greenland Ice Sheet significantly influence overall ice sheet mass balance. Considerable short term (years to decades) retreat and fluctuations in velocity of Jakobshavn Isbræ, western Greenland, illustrate the complex nature by which large outlet glaciers respond to climate change, making predictions of future ice sheet change challenging. To provide a longer...
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ژورنال
عنوان ژورنال: PAGES news
سال: 1999
ISSN: 1563-0803,1563-0803
DOI: 10.22498/pages.7.2.12