An Inquiry About the 35-Year-Period Climatic Variations

2000 ◽  
pp. 255-268
Author(s):  
Nico Stehr ◽  
Hans von Storch
Keyword(s):  
Climatic Variations

Larval Behavior and Protective Implications for Sea Scallops and Surf Clams within the Middle Atlantic Bight: Part Two, Variability of Physical Environment and Larval Behaviors

2019 ◽  
Vol 2 (2) ◽  
Keyword(s):  
Physical Environment ◽  
Climate Changes ◽  
Larval Growth ◽  
Growth Patterns ◽  
Larval Behavior ◽  
Larval Release ◽  
Physical Conditions ◽  
Climatic Variations ◽  
Middle Atlantic ◽  
Sea Scallops

Larval growth and settlement rates are important larval behaviors for larval protections. The variability of larval growthsettlement rates and physical conditions for 2006-2012 and in the future with potential climate changes was studied using the coupling ROMS-IMBs, and new temperature and current indexes. Forty-four experimental cases were conducted for larval growth patterns and release mechanisms, showing the spatial, seasonal, annual, and climatic variations of larval growthsettlement rates and physical conditions, demonstrating that the slight different larval temperature-adaption and larval release strategies made difference in larval growth-settlement rates, and displaying that larval growth and settlement rates highly depended upon physical conditions and were vulnerable to climate changes.

scholarly journals The effect of climatic variations on agricultural risk

1985 ◽  
Vol 7 (1) ◽  
pp. 95-110 ◽  
Author(s):  
M. L. Parry ◽  
T. R. Carter
Keyword(s):  
Agricultural Risk ◽  
Climatic Variations

Dust, Clouds, Rain Types, and Climatic Variations in Tropical North Africa

1982 ◽  
Vol 18 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Jean Maley
Keyword(s):  
North Africa ◽  
Atmospheric Electricity ◽  
Thunderstorm Activity ◽  
Tropical Africa ◽  
Tropical Zone ◽  
Climatic Variations ◽  
Dust Clouds ◽  
Climatic Evolution ◽  
Cloud Thickness ◽  
Second Period

AbstractDust and processes of raindrop formation in the clouds play a very important role in the climatic evolution of tropical north Africa. Sedimentologic, stratigraphic, pedologic, geomorphologic, and palynologic data converge to show that a major environmental change occurred in tropical Africa about 7000 yr B.P. In the Sudanian and Sudano–Guinean zones (wet tropical zone), from 15,000 to 7000 yr B.P., rivers deposited mostly clay, while from 7000 to 4000 yr B.P. they deposited mostly sand. During the first period, pedogenesis was vertisolic (montmorillonite dominant), associated with pollen belonging mostly to vegetation typical of hydromorphic soils, while during the second period pedogenesis was of ferruginous type (kaolinite dominant) with pollen belonging mostly to vegetation typical of well-drained soils. The great change near 7000 yr B.P. is linked chiefly to a major hydrological change that appears related to a change in the size of raindrops: from fine rains associated with considerable atmospheric dust (raindrop diameter essentially less than 2 mm) to the second period associated with thunderstorm rains (raindrop diameter mostly greater than 2 mm). The size of raindrops is related particularly to cloud thickness and dust concentration in the troposphere. Thunderstorm activity is influenced also by fluctuations of the atmospheric electricity, modulated by the sun.

Sign in / Sign up

Export Citation Format

Share Document