scholarly journals Regional Climate Change in Southeast Mexico-Yucatan Peninsula, Central America and the Caribbean

2021 ◽  
Vol 11 (18) ◽  
pp. 8284
Author(s):  
Mercedes Andrade-Velázquez ◽  
Ojilve Ramón Medrano-Pérez ◽  
Martín José Montero-Martínez ◽  
Alejandro Alcudia-Aguilar
Keyword(s):  
Climate Change ◽  
Central America ◽  
Southern Oscillation ◽  
Yucatan Peninsula ◽  
Regional Climate ◽  
Study Region ◽  
Entire Study ◽  
Yucatán Peninsula ◽  
The Caribbean ◽  
Southeast Mexico

This study analyzes the mean, maximum, and minimum temperatures and precipitation trends in southeast Mexico-Yucatan Peninsula, Central America and the Caribbean regions. The Climate Research Unit (CRU) TS 4.01, with a spatial resolution of 0.5° × 0.5°, was the database used in this research. The trends of the four selected climate variables cover the period from 1960 to 2016. The results obtained show a clear and consistent warming trend, at a rate of about 0.01 °C/year for the entire study region. These results are consistent with some previous studies and the IPCC reports. While the trends of precipitation anomalies are slightly positive (~0.1 mm/year) for southeast Mexico-Yucatan Peninsula and almost the entire Caribbean, for Central America (CA) the trends are negative. The study also presents the correlation between temperatures and precipitation versus El Niño Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO), and Atlantic Multidecadal Oscillation (AMO) drivers, indicating global warming and frequency signals from the climate drivers. In terms of the near future (2015–2039), three Representative Concentration Pathways (RPC) show the same trend of temperature increase as the historical record. The RCP 6.0 has trends similar to the historical records for CA and southeast Mexico-Yucatan Peninsula, while the Caribbean corresponds to RCP 4.5. In terms of the far-future (2075–2099), RCP 6.0 is more ad-hoc for southeastern Mexico-Yucatan Peninsula, and RCP 8.5 corresponds to Central America. These results could help to focus actions and measures against the impacts of climate change in the entire study region.

scholarly journals Spatially differentiated changes in regional climate and underlying drivers in southwestern China

2021 ◽  
Author(s):  
Meng Wang ◽  
Chao Jiang ◽  
Osbert Jianxin Sun
Keyword(s):  
Climate Change ◽  
Turning Point ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
Regional Climate ◽  
Southwestern China ◽  
Study Region ◽  
Entire Study ◽  
Climate Systems ◽  
Guizhou Plateau

AbstractThe climate in Southwest China are predominantly under the influences of three contrasting climate systems, namely the East Asian monsoon, the South Asian monsoon, and the westerlies. However, it is unclear if the diversified climate systems, in combination with the complex terrain and varying vegetation types, would result in contrasting patterns of changes in climate across the region. Based on the CRU TS data for the period 1901−2017, we examined the spatiotemporal characteristics of the regional climate, and identified types of climate change patterns and drivers. Overall, the region experienced significant increases in annual mean temperature during 1901−2017, with occurrence of a significant turning point in 1954 for a more pronounced warming (0.16 °C/10 a). The annual precipitation fluctuated greatly over the study period without apparent trend, albeit the occurrence of a significant turning point in 1928 for a slight increase in the later period (1.19 mm/10 a). Spatially the multi-year averages of selective climate variables during 1901–2017 displayed a trend of decreases from southeast to northwest, but with increasing variability. We identified five major climate change types across the study region, including warmer (T+), drier (P−), warmer-drier (T+P−), warmer-wetter (T+P+), and no significant changes (NSC). The type T+P+ mainly occurred in the western parts over the plateau sub-frigid semiarid ecozone (77.0%) and the plateau sub-frigid semihumid ecozone (19.9%). The central parts of the region are characterized by the type T+, corresponding to six ecozones, including the mid-subtropical humid ecozone (33.1%), the plateau temperate humid-semihumid ecozone (28.8%), the plateau sub-rigid semihumid ecozone (9.5%), the southern subtropical humid ecozone (8.1%), the plateau sub-frigid arid ecozone (7.3%), and the plateau temperate semiarid ecozone (6.6%). No significant change in climate was detected for the eastern parts over the mid-subtropical humid ecozone (67.3%), the plateau temperate humid and semihumid ecozone (19.5%) and the plateau sub-frigid semihumid ecozone (8.8%). The types P− and T+P− together accounted for less than 5% of the entire study region, which predominantly occurred in central Yunnan-Guizhou Plateau and south of the southeastern Xizang, corresponding predominantly to the mid-subtropical humid ecozone. Across the region and within the zonal climate change types, vegetation and topography both played a significant role in determining the climate variability and magnitude of changes. Our results suggest that the southwestern China experienced intensified influences of the southeasterly monsoon and the southerly monsoon in the regional climate, while the westerly alpine influences subsided; topography and vegetation affected the magnitudes of the directional changes in climate at a local scale.

scholarly journals Composition and fluxes of submarine groundwater along the Caribbean coast of the Yucatan Peninsula

2014 ◽  
Vol 77 ◽  
pp. 38-50 ◽  
Author(s):  
Kimberly A. Null ◽  
Karen L. Knee ◽  
Elizabeth D. Crook ◽  
Nicholas R. de Sieyes ◽  
Mario Rebolledo-Vieyra ◽  
...  
Keyword(s):  
Yucatan Peninsula ◽  
Caribbean Coast ◽  
Yucatán Peninsula ◽  
Submarine Groundwater ◽  
The Caribbean

scholarly journals Impact of climate change on hydro-meteorological drought over the Be River Basin, Viet Nam

2021 ◽  
Author(s):  
Dao Nguyen Khoi ◽  
Truong Thao Sam ◽  
Pham Thi Loi ◽  
Bui Viet Hung ◽  
Van Thinh Nguyen
Keyword(s):  
Climate Change ◽  
River Basin ◽  
General Circulation ◽  
Southern Oscillation ◽  
Meteorological Drought ◽  
Climate Projections ◽  
Research Station ◽  
Climate Change Scenarios ◽  
Study Region ◽  
Meteorological Droughts

Abstract In this paper, the responses of hydro-meteorological drought to changing climate in the Be River Basin located in Southern Vietnam are investigated. Climate change scenarios for the study area were statistically downscaled using the Long Ashton Research Station Weather Generator tool, which incorporates climate projections from Coupled Model Intercomparison Project 5 (CMIP5) based on an ensemble of five general circulation models (Can-ESM2, CNRM-CM5, HadGEM2-AO, IPSL-CM5A-LR, and MPI-ESM-MR) under two Representative Concentration Pathway (RCP) scenarios (RCP4.5 and RCP8.5). The Soil and Water Assessment Tool model was employed to simulate streamflow for the baseline time period and three consecutive future 20 year periods of 2030s (2021–2040), 2050s (2041–2060), and 2070s (2061–2080). Based on the simulation results, the Standardized Precipitation Index and Standardized Discharge Index were estimated to evaluate the features of hydro-meteorological droughts. The hydrological drought has 1-month lag time from the meteorological drought and the hydro-meteorological droughts have negative correlations with the El Niño Southern Oscillation and Pacific Decadal Oscillation. Under the climate changing impacts, the trends of drought severity will decrease in the future; while the trends of drought frequency will increase in the near future period (2030s), but decrease in the following future periods (2050 and 2070s). The findings of this study can provide useful information to the policy and decisionmakers for a better future planning and management of water resources in the study region.

Short visits reveal consistent patterns of interyear and intercolony variation in seabird nestling diet and performance

2002 ◽  
Vol 80 (12) ◽  
pp. 2190-2199 ◽  
Author(s):  
D F Bertram ◽  
T Golumbia ◽  
G K Davoren ◽  
A Harfenist ◽  
J Brown
Keyword(s):  
Growth Performance ◽  
Large Scale ◽  
Southern Oscillation ◽  
Large Contribution ◽  
Fish Prey ◽  
Study Region ◽  
Entire Study ◽  
Nestling Growth ◽  
Nestling Development ◽  
Nestling Diet

To investigate the utility of short visits to seabird colonies to gauge nestling growth performance and diet, in 4 consecutive years (1995–1998) we measured nestling development and diet of Rhinoceros Auklets (Cerorhinca monocerata) at three colonies in British Columbia: Seabird Rocks, Triangle Island, and SGaang Gwaii (Anthony Island). In all years, nestlings of a given wing length on Triangle Island were significantly smaller than those on Seabird Rocks or SGaang Gwaii. Meals were also significantly lighter on Triangle Island than on Seabird Rocks or SGaang Gwaii; meals on the latter two islands were indistinguishable in mass. Retarded nestling development and small meal size on Triangle Island likely reflect the large contribution of rockfish (Sebastes spp.) to nestling diet on that colony alone. The intercolony differences in nestling performance appear to reflect the strong influence of local fish prey populations. Nonetheless, a united decline in performance in 1996 and subsequent increase on all colonies suggest the influence of large-scale ocean climate phenomena on our entire study region and beyond. We did not, however, observe noticeable effects of the 1997–1998 El Niño Southern Oscillation event on nestling growth performance or diet. We discuss the utility of our short-visit techniques for seabird-monitoring programs.

Typhliasina Whitley 1951, an unneeded replacement name for Typhlias Hubbs 1938 (Ophidiiformes: Dinematichthyidae)

Zootaxa ◽  
2017 ◽  
Vol 4319 (2) ◽  
pp. 371
Author(s):  
CHRISTOPHER SCHARPF
Keyword(s):  
Central America ◽  
New Genus ◽  
Yucatan Peninsula ◽  
Freshwater Fishes ◽  
Junior Synonym ◽  
New Genus And Species ◽  
Yucatán Peninsula

Hubbs (1938) described Typhlias pearsei, representing both a new genus and species of blind cusk-eel (Ophidiiformes: Dinematichthyidae) from freshwater caves and sinkholes of the Yucatán peninsula of Mexico. Whitley (1951:67) proposed Typhliasina as a replacement name for Typhlias, citing a list of zoological names published by Neave (1950:284), but did not mention the taxon and author to which the putative senior homonym belonged. Cohen and Nielsen (1978:60) treated Typhliasina as a junior synonym of Ogilbia Jordan & Evermann 1898 in their provisional classification of the Ophidiiformes, wherein they mentioned that Typhlias Hubbs 1938 is preoccupied by Typhlias Bryce 1910 in rotifers. Typhlias Bryce 1910 has subsequently been given as the senior homonym in three important works: the FAO species catalog of ophidiiform fishes (Nielsen & Cohen 1999:134), Checklist of the Freshwater Fishes of South and Central America (Nielsen 2003:507), and a revisionary study (Møller et al. 2004:186) in which Typhliasina is resurrected from the synonymy of Ogilbia. However, a careful reading of Neave (1950) and Bryce (1910) reveals a fact that had apparently been overlooked: Typhlias Bryce 1910 is not an available name, but a lapsus for Typhlina Ehrenberg 1831. 

Bird population declines in the Chametla wetland (Southern Gulf of California): Evidence of stress at the assemblage level

2019 ◽  
Vol 65 (3-4) ◽  
pp. 119-129
Author(s):  
G. Brabata ◽  
C. Battisti ◽  
R. Carmona ◽  
C.A. Sánchez-Caballero
Keyword(s):  
Gulf Of California ◽  
Southern Oscillation ◽  
Regional Climate ◽  
Sharp Decrease ◽  
Population Declines ◽  
Stopover Site ◽  
Entire Study ◽  
Climate Conditions ◽  
Bird Assemblages ◽  
Bird Assemblage

The Chametla wetland is used by shorebirds as a stopover site during their autumn migration and it is also an important breeding area for several species of waterbirds. The objective of this work was to compare the bird assemblages in Chametla wetland during three sampling periods: 1) 1991–1992; 2) 1997–1998 which was subjected to El Nino Southern Oscillation (ENSO) climate conditions and 3) 2005–2006. Bird communities were characterized in terms of species composition and diversity, using similarity analysis. Bird assemblage composition differed across years and seasons. Seasonal variations in composition and diversity were related to the presence/absence of phenological-characterized species (migratory vs. wintering species). The highest species richness was recorded under the ENSO period (1997–1998). We observed a sharp decrease in shorebird numbers, with evident stress at the assemblage level throughout the entire study period. There seems to be a transition of the bird assemblages from shorebird dominance to a dominance by long-legged wading birds and waterfowl species, which could be related to water level variation and changes in the quality/availability of food in the intertidal zone. The joint pressures of regional climate variation combined with local anthropogenic perturbations may lead to changes in bird assemblage in the Chametla wetland.

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