The Laurentide ice sheet retreated and advanced with climatic variations and these changes in ice cover contributed to isostatic adjustments in the level of the land over which the watercourses ran.
22.
The semi-agricultural economy of the Southern Plains villagers was always vulnerable due to frequent droughts and climatic variations, although the livelihood of the villagers was enhanced by the periodic abundance of bison.
23.
Greece is largely mountainous, with its latitude ranging from 35?02 N to 42?02 N and in longitude from 19?02 E to 28?02 E . As a result, the country has considerable climatic variation.
24.
The wide climatic variation in the department allows for the production of a variety of agricultural products, including temperate fruits, vegetables and cereals in the highlands, as well as coffee on the lower slopes.
25.
The reasons for decline are not known; Moyle suggests estuary outflow reduction, entrainment is connection with the pumping of water out of the Delta area, climatic variations, water pollution, and the impact of introduced species as possibilities.
26.
Beee has endured all climatic variations since the 1 December 2013 and is sacrificing creature comforts in an act of Non-Violent Direct Action to bring attention to the need to protect this unique and globally significant forest.
27.
Political and popular debate concerning the existence and cause of climate change includes the reasons for the increase seen in the instrumental temperature record, whether the warming trend exceeds normal climatic variations, and whether consequences of global warming will be.
28.
Lins'most controversial research, which has not been fully embraced by the climate science community, suggests that the significance of climate trends may be greatly overstated because it does not consider the possibility that long-term persistence is a component of climatic variations.
29.
One, Dr . Michael E . Schlesinger, a climatologist at the University of Illinois at Urbana-Champaign, said that experts had insufficient knowledge of the magnitude of natural climatic variations, especially solar radiation, to gauge how large the human impact was by comparison.
30.
This project seeks to identify sources of old, previously overlooked, marine meteorological data from colonial ( especially lighthouse ) records and from the logbooks of Royal Navy vessels through from the 18th century and, thereby, to lend a longer-term perspective to more recent climatic variations.
