Results 21 to 30 of about 1,693,038 (297)

Seasonal variability in the incidence of carcinomatous meningitis [PDF]

Journal of Neurosurgery, 2015
OBJECT The aim of the study was to investigate whether there are seasonal differences in the occurrence of carcinomatous meningitis (CM), with a greater prevalence of the disease in months with higher temperatures. METHODS The authors searched the records of all patients with a diagnosis of CM from 1998 until 2013 at the University Hospital of Patras,
Angelos, Koutras, Minas, Sakellakis, Thomas, Makatsoris, Charalabia, Psachoulia, Maria, Kardari, Achilleas, Nikolakopoulos, Charalabos, Gogos, Haralabos P, Kalofonos   +7 more
openaire   +2 more sources

Seasonal variation of ecosystem photosynthetic capacity and its environmental drivers in global grasslands

Frontiers in Ecology and Evolution, 2023
Ecosystem maximum photosynthetic rate (Amax) is an important ecosystem functional property, as it is critical for ecosystem productivity modeling. However, little is known about the mechanisms that regulate the seasonal variation of Amax in grasslands ...
Xiuzhi Chen, Xiuzhi Chen, Xiuzhi Chen, Xiaoli Ren, Xiaoli Ren, Xiaoli Ren, Honglin He, Honglin He, Honglin He, Li Zhang, Li Zhang, Li Zhang, Yan Lv, Yan Lv, Yan Lv   +14 more
doaj   +1 more source

Seasonality of the North Pacific Oligotrophic Gyre area in the past two decades and a modelling perspective for the 21st century [PDF]

Biogeosciences
As the largest oligotrophic ocean globally, the North Pacific oligotrophic ocean gyre (NPOG) exhibits pronounced variability on seasonal, decadal, and centennial time scales.
S. Meng, S. Meng, S. Meng, X. Gong, X. Gong, B. G. M. Webber, M. Joshi, X. Ding, X. Gong, X. Gong, M. Gu, M. Gu, H. Gao, H. Gao   +13 more
doaj   +1 more source

Model evaluation for seasonal forecasting over southern Africa [PDF]

, 2011
Includes bibliographical references.This study contributes to a broader effort of institutions toward improving seasonal forecasts over southern Africa.
Browne, Nana Ama Kum
core   +1 more source

Spatial and temporal variability of phytoplankton photophysiology in the Atlantic Southern Ocean

Frontiers in Marine Science, 2022
Active chlorophyll-a fluorescence was measured during five summer research cruises (2008 – 2016), spanning the Atlantic sector of the Southern Ocean.
Asmita Singh, Asmita Singh, Sandy J. Thomalla, Susanne Fietz, Thomas J. Ryan-Keogh   +4 more
doaj   +1 more source

Seasonal variability in the Agulhas Retroflection Region [PDF]

Geophysical Research Letters, 1998
The objective of this article is to present evidence for the existence of seasonal variability in sea surface height (SSH) anomaly in the Agulhas Retroflection region. TOPEX/POSEIDON altimeter data are used to estimate seasonal changes in the mesoscale SSH variability. There is a seasonal oscillation of SSH variability characterized by a maximum during
Matano, R.P., Simionato, C.G., de Ruijter, W.P.M., van Leeuwen, P.J., Strub, P.T., Chelton, D.B., Schlax, M.G.   +6 more
openaire   +2 more sources

Seasonal and interannual variability of North American isoprene emissions as determined by formaldehyde column measurements from space [PDF]

, 2003
Formaldehyde (HCHO) columns measured from space by solar UV backscatter allow mapping of reactive hydrocarbon emissions. The principal contributor to these emissions during the growing season is the biogenic hydrocarbon isoprene, which is of great ...
Chance, K. V., Abbot, Dorian S, Palmer, Paul I, Guenther, Alex, Palmer, P. I., Jacob, Daniel J, Guenther, A., Martin, Randall V, Chance, Kelly V, Abbot, D. S., Martin, R. V., Jacob, D. J.   +11 more
core   +1 more source

Species richness and asynchrony maintain the stability of primary productivity against seasonal climatic variability

Frontiers in Plant Science, 2022
The stability of grassland communities informs us about the ability of grasslands to provide reliable services despite environmental fluctuations. There is large evidence that higher plant diversity and asynchrony among species stabilizes grassland ...
Ze Zhang, Ze Zhang, Yann Hautier, Tiejun Bao, Tiejun Bao, Jie Yang, Jie Yang, Hua Qing, Hua Qing, Zhongling Liu, Zhongling Liu, Min Wang, Min Wang, Taoke Li, Taoke Li, Mei Yan, Mei Yan, Guanglin Zhang, Guanglin Zhang   +18 more
doaj   +1 more source

Interannual variability versus seasonal variability in the Tropical Atlantic

Geophysical Research Letters, 1984
Monthly fields of sea surface temperature and wind stress for the tropical Atlantic are constructed for January 1964 to December 1979. Inside the Gulf of Guinea the amplitude of the seasonal variability of SST ranges between 2.5 and 4 times greater than the interannual variability. In the remainder of the equatorial Atlantic this measure is less than 2.
/Picaut, Joël, Servain, J., Busalacchi, A.J., Seva, M.   +3 more
openaire   +2 more sources

Observed and simulated variability of the AMOC at 26°N and 41°N [PDF]

, 2013
Timeseries of the observational estimate of the Atlantic meridional overturning circulation (AMOC) have recently become available, but so far no contemporaneous relation has been documented between them. Here, we analyze the variability of the 26°N RAPID
Frajka-Williams, E., Mielke, C., Baehr, J.   +2 more
core   +1 more source