نتایج جستجو برای: four periods including present warm period

تعداد نتایج: 3087212  

2003
AD Rosanne D. D’Arrigo Edward R. Cook Michael E. Mann Gordon C. Jacoby

[1] Arctic Oscillation (AO) changes are inferred from a treering reconstruction of a warm-season temperature index. The reconstruction covers AD 1650–1975 and is based largely on chronologies from circumpolar-Arctic and circum-North Atlantic areas. It accounts for 48% of the variance in the instrumental AO record from 1900 to 1975, verifies using independent data, and exhibits its largest varia...

2003
Rosanne D. D’Arrigo Edward R. Cook Michael E. Mann Gordon C. Jacoby

[1] Arctic Oscillation (AO) changes are inferred from a treering reconstruction of a warm-season temperature index. The reconstruction covers AD 1650–1975 and is based largely on chronologies from circumpolar-Arctic and circum-North Atlantic areas. It accounts for 48% of the variance in the instrumental AO record from 1900 to 1975, verifies using independent data, and exhibits its largest varia...

2017
Alí Espinosa-Magaña Enrique Lozano-Álvarez Patricia Briones-Fourzán

The non-feeding postlarva (puerulus) of spiny lobsters actively swims from the open ocean to the coastal habitats where it settles and molts to the first-stage juvenile (JI). Because pueruli use much of their energy reserves swimming and preparing for the post-settlement molt, the survival of JIs presumably depends on resuming feeding as soon as possible. To test this hypothesis, the resistance...

Journal: :Paleoceanography and paleoclimatology 2021

Global warming is most pronounced in the Arctic as evident from massive sea ice loss during past few decades. The Mid-Pliocene Warm Period (MPWP), 3.264 – 3.025 million years ago with similar CO2 levels, nearest analogue for understanding impacts of future global warming. High-resolution studies relative nutrient utilization and productivity Atlantic-Arctic Gateway (AAG) can provide insight int...

Journal: :تحقیقات دامپزشکی 0
ناصر امام جمعه کاشان گروه علوم دامی مجتمع آموزشی ( پردیس) ابوریحان دانشگاه تهران مجید خالداری گروه علوم دامی دانشکده کشاورزی و منابع طبیعی کرج دانشگاه تهران احمد افضل زاده گروه علوم دامی مجتمع آموزشی ( پردیس) ابوریحان دانشگاه تهران

twenty four male lambs divided into four groups and were allocated to 90, 105, 120 and 135 days of fattening periods.at the end of each fattening period, lambs were slaughtered. the percentage of cold carcass on the basis of empty body weight in the mentioned periods were 57.0 ± 0.94, 57.5 ±1.7, 59.9 ±3.3 and 62.2 ±4.4,respectively(p

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ادبیات و علوم انسانی 1391

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

2016
Qian-Qian Zhang Thierry Smith Jian Yang Cheng-Sen Li

The early Cenozoic was characterized by a very warm climate especially during the Early Eocene. To understand climatic changes in eastern Asia, we reconstructed the Early Eocene vegetation and climate based on palynological data of a borehole from Wutu coal mine, East China and evaluated the climatic differences between eastern Asia and Central Europe. The Wutu palynological assemblages indicat...

2013
Fengmei Yang Naiang Wang Feng Shi Fredrik Charpentier Ljungqvist Shigong Wang Zexin Fan Junwei Lu

A total of 290 tree-ring samples, collected from six sites in the West Qinling Mountains of China, were used to develop six new standard tree-ring chronologies. In addition, 73 proxy records were assembled in collaboration with Chinese and international scholars, from 27 publically available proxy records and 40 tree-ring chronologies that are not available in public datasets. These records wer...

Journal: :British medical journal 1968
H J White D B Evans R Y Calne

Twenty-six renal grafts four months or more after transplantation have been shown to function satisfactorily when the donor's age has varied from 10 to 64 years and the period of warm ischaemia has been between 26 and 133 minutes. It is suggested that a more lenient view be adopted with respect to the age of the donor, but that a warm ischaemia time of two hours should not be exceeded.

Journal: :Science 2006
Timothy J Osborn Keith R Briffa

Periods of widespread warmth or cold are identified by positive or negative deviations that are synchronous across a number of temperature-sensitive proxy records drawn from the Northern Hemisphere. The most significant and longest duration feature during the last 1200 years is the geographical extent of warmth in the middle to late 20th century. Positive anomalies during 890 to 1170 and negati...

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