Results 81 to 90 of about 5,635,835 (408)
Frontiers in Ecology and Evolution, 2023 IntroductionAs a vital component within glacier systems, the occurrences of glacial lake disasters in high mountain regions have progressively emerged as one of the most destructive natural calamities amid the backdrop of global warming.
Zhengquan Liu +18 more
doaj +1 more source
Periodic Orbits for a Discontinuous Vector Field Arising from a Conceptual Model of Glacial Cycles [PDF]
, 2015 Conceptual climate models provide an approach to understanding climate processes through a mathematical analysis of an approximation to reality. Recently, these models have also provided interesting examples of nonsmooth dynamical systems. Here we discuss a conceptual model of glacial cycles consisting of a system of three ordinary differential ...
arxiv +1 more source
Grazing bifurcations and transitions between periodic states of the PP04 model for the glacial cycle [PDF]
arXiv, 2022 We look at the periodic behaviour of the Earth's glacial cycles and the transitions between different periodic states when either external parameters (such as $\omega$) or internal parameters (such as $d$) are varied. We model this using the PP04 model of climate change. This is a forced discontinuous Filippov (non-smooth) dynamical system.
arxiv
Upper Rhine Valley: A migration crossroads of middle European oaks [PDF]
Forest Ecology and Management 304 (2013): pp. 89-98, 2013 The indigenous oak species (Quercus spp.) of the Upper Rhine Valley have migrated to their current distribution range in the area after the transition to the Holocene interglacial. Since post-glacial recolonization, they have been subjected to ecological changes and human impact. By using chloroplast microsatellite markers (cpSSRs), we provide detailed
arxiv +1 more source
, 2017 Formation of deep water in the high-latitude North Atlantic is important for the global meridional ocean circulation, and its variability in the past may have played an important role in regional and global climate change. Here we study ocean circulation
M. Ezat +6 more
semanticscholar +1 more source
Rain driven by receding ice sheets as a cause of past climate change [PDF]
, 2009 The Younger Dryas cold period, which interrupted the transition from the last ice age to modern conditions in Greenland, is one of the most dramatic incidents of abrupt climate change reconstructed from paleoclimate proxy records. Changes in the Atlantic
Bitz, Cecilia M. +2 more
core +1 more source
Molecular Oncology, EarlyView.This study simultaneously investigated circulating tumor cells (CTCs) and exosomes from small‐cell lung cancer (SCLC) patients. The elevated expression of JUNB and CXCR4 in CTCs was a poor prognostic factor for SCLC patients, whereas exosomal overexpression of these biomarkers revealed a high discrimination ability of patients from healthy individuals,
Dimitrios Papakonstantinou +13 more
wiley +1 more source
Nature, 1890 I HAVE long felt convinced that geologists are being misled in reference to former glacial epochs by failing to give due thought to a consideration referred to on former occasions,1 viz. that when the present surface of the globe has been disintegrated, washed into the sea, and transformed into rock, there will undoubtedly then be about as little ...
openaire +3 more sources
Deglaciation constraints in the Parâng Mountains, Southern Romania, using surface exposure dating [PDF]
, 2015 Cosmogenic nuclide surface exposure ages have been widely used to constrain glacial chronologies in the European regions. This paper brings new evidence that the Romanian Carpathians sheltered mountain glaciers in their upper valleys and cirques until ...
Corpade, C. +3 more
core +1 more source
Molecular Oncology, Volume 19, Issue 5, Page 1532-1545, May 2025.This study explores how sepsis affects GC progression by creating an immunosuppressive environment. Our findings reveal that sepsis promotes immune dysregulation, enhancing tumor growth and metastasis. Targeting the PD‐1/PD‐L1 pathway with monoclonal antibodies shows potential for restoring immune function and improving outcomes in cancer patients ...
Yiding Wang +10 more
wiley +1 more source