Results 1 to 10 of about 301,665 (287)

Southern hemisphere ceratosaurs evolved feeding mechanics paralleling those of Northern hemisphere tyrannosaurids [PDF]

Scientific Reports
Ceratosaurs (Ceratosauria), including Ceratosaurus and derived abelisaurids such as Carnotaurus, were the dominant large-bodied predators in Cretaceous ecosystems of the Southern Hemisphere, paralleling the ecological role of tyrannosaurids in the ...
Andre J. Rowe, Mauricio A. Cerroni, Emily J. Rayfield   +2 more
doaj   +2 more sources

Multigene Phylogeography of Bactrocera caudata (Insecta: Tephritidae): Distinct Genetic Lineages in Northern and Southern Hemispheres. [PDF]

PLoS ONE, 2015
Bactrocera caudata is a pest of pumpkin flower. Specimens of B. caudata from the northern hemisphere (mainland Asia) and southern hemisphere (Indonesia) were analysed using the partial DNA sequences of the nuclear 28S rRNA and internal transcribed spacer
Hoi-Sen Yong, Phaik-Eem Lim, Ji Tan, Sze-Looi Song, I Wayan Suana, Praphathip Eamsobhana   +5 more
doaj   +1 more source

Large hemispheric differences in the Hadley cell strength variability due to ocean coupling

npj Climate and Atmospheric Science, 2022
By modulating the distribution of heat, precipitation and moisture, the Hadley cell holds large climate impacts at low and subtropical latitudes. Here we show that the interannual variability of the annual mean Hadley cell strength is ~ 30% less in the ...
Rei Chemke
doaj   +1 more source

Instantaneous Achievement of the Hall and Pedersen–Cowling Current Circuits in Northern and Southern Hemispheres During the Geomagnetic Sudden Commencement on 12 May 2021

Frontiers in Astronomy and Space Sciences, 2022
The present article aims at a consistent understanding of observation, theoretical model, and simulation with the geomagnetic sudden commencement (SC) observed in the morning and afternoon at high and middle latitudes in the northern and southern ...
Takashi Kikuchi, Tohru Araki, Kumiko K. Hashimoto, Yusuke Ebihara, Takashi Tanaka, Yukitoshi Nishimura, Geeta Vichare, Ashwini K. Sinha, Jaroslav Chum, Keisuke Hosokawa, Ichiro Tomizawa, Yoshimasa Tanaka, Yoshimasa Tanaka, Yoshimasa Tanaka, Akira Kadokura, Akira Kadokura, Akira Kadokura   +16 more
doaj   +1 more source

Multidecadal variation of northern hemisphere summer monsoon forced by the SST inter-hemispheric dipole

Environmental Research Letters, 2022
The sea surface temperature inter-hemispheric dipole (SSTID) is an important variability mode of global SST anomalies, characterized by an anti-phase variation of SST between the two hemispheres.
Jiaqing Xue, Bingchao Wang, Yongkui Yu, Jianping Li, Cheng Sun, Jiangyu Mao   +5 more
doaj   +1 more source

Waviness of the Southern Hemisphere wintertime polar and subtropical jets [PDF]

Weather and Climate Dynamics, 2023
The recently developed average latitudinal displacement (ALD) methodology is applied to assess the waviness of the austral-winter subtropical and polar jets using three different reanalysis data sets.
J. E. Martin, T. Norton
doaj   +1 more source

Periodic Variation of Solar Flare Index for the Last Solar Cycle (Cycle 24)

Advances in Astronomy, 2021
In this study, we used the flare index (FI) data taken from Kandilli Observatory for the period of 2009–2020. The data sets are analyzed in three categories as Northern Hemisphere, Southern Hemisphere, and total FI data sets.
Atila Ozguc, Ali Kilcik, Volkan Sarp, Hülya Yeşilyaprak, Rıza Pektaş   +4 more
doaj   +1 more source

How the Great Plains Dust Bowl drought spread heat extremes around the Northern Hemisphere

Scientific Reports, 2022
Extraordinary heat extremes occurred in the 1930s in areas of the Northern Hemisphere far from the record setting heat over the US associated with the Great Plains Dust Bowl drought.
Gerald A. Meehl, Haiyan Teng, Nan Rosenbloom, Aixue Hu, Claudia Tebaldi, Guy Walton   +5 more
doaj   +1 more source

Bayesian evaluation of the southern hemisphere radiocarbon offset during the holocene [PDF]

, 2009
While an interhemispheric offset in atmospheric radiocarbon levels from AD 1950–950 is now well established, its existence earlier in the Holocene is less clear, with some studies reporting globally uniform 14C levels while others finding Southern ...
Hogg, Alan G., Palmer, Jonathan G., Ramsey, Christopher Bronk, Turney, Chris S.M.   +3 more
core   +2 more sources

Plutella polaris Zeller, 1880 (Lepidoptera, Plutellidae) rediscovered at Svalbard, Norway, with comments on its taxonomic position

Nota Lepidopterologica, 2018
After 142 years, Plutella polaris Zeller, 1880 was rediscovered at Svalbard, Norway, in 2015. The locality and its vegetation are described. The specimen is the first female ever recorded, and its genitalia are illustrated.
Geir Søli, Leif Aarvik, Trude Magnussen
doaj   +3 more sources