نتایج جستجو برای: aridification

تعداد نتایج: 280  

Journal: :Geochimica et Cosmochimica Acta 2021

The arid interior of Asia is the largest source dust deposited in North Pacific Ocean, and some even transported to Greenland. Investigating provenance history Asian can provide strong constraints on evolution topography climate interior. Eolian Nd isotopic records preserved Ocean sediments since ∼40 Ma a spatially integrated first-order constraint changes dust. However, lack similarly long fro...

Journal: :Journal of Geographical Sciences 2023

Climate change is expected to introduce more water demand in the face of diminishing supplies, intensifying degree aridity observed terrestrial ecosystems 21st century. This study investigated spatiotemporal variability within global index (AI) values from 1970–2018. The results revealed an overall drying trend (0.0016 yr−1, p<0.01), with humid and semi-humid regions experiencing significant th...

Journal: :Publicación electrónica de la Asociación Paleontológica Argentina. 2022

The continental early–middle Miocene Santa Cruz Formation (SCF) from Patagonia is one of the most important stratigraphic units southern South America in terms terrestrial Neogene record. Its fossil content was pivotal for establishing succession Cenozoic faunas and formed basis Santacrucian American Land Mammal Age. Despite updated knowledge recently achieved, distribution many taxa within SCF...

Journal: :Geological Society, London, Special Publications 2023

Abstract Palaeo-loess and silty aeolian-marine strata are well recognized across the Carboniferous–Permian of equatorial Pangaea. Aeolian-transported dust loess appear in Late Devonian west, common by Carboniferous, predominate Pangaea Permian. The thickest deposits Earth history – excess 1000 m date from this time, archive unusually dusty conditions, especially compared to dearth Cenozoic. Loe...

Journal: :Quaternary International 2021

The steppe of northern Tierra del Fuego is an important region for studying climate variability in the Southern Hemisphere, due to its position at southern margin Hemisphere Westerly Wind belt. Here we present a multiproxy analysis sedimentary sequence from Laguna Carmen (53°S, 68°W) which provides evidence progressive aridity and strengthening low-level Westerlies during Late Holocene. We iden...

Journal: :Ibis 2022

Phylogenetic relationships are often challenging to resolve in recent/younger lineages when only a few loci used. Ultra-conserved elements (UCEs) highly conserved regions across taxa that help shallow and deep divergences. We utilized UCEs harvested from whole genomes assess the phylogenetic position taxonomic affiliation of an endangered endemic owlet family Strigidae, Forest Owlet Athene blew...

Journal: :Frontiers in Earth Science 2021

Eolian dust deposited in the North Pacific is an important archive of evolutionary history Asian interior source regions and climate system. Here, we present a ∼1 Myr sediment magnetic record from central to characterize eolian properties since middle Pleistocene. For studied sediments, components are mainly identified as biogenic magnetite detrital minerals (dust volcanic origins) based on coe...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید