Ice‐conditions on the Mississippi River at Davenport, Iowa
1938; American Geophysical Union; Volume: 19; Issue: 2 Linguagem: Inglês
10.1029/tr019i002p00590-2
ISSN2379-6723
Autores Tópico(s)Oil Spill Detection and Mitigation
ResumoThese records are compiled from various sources. Records from 1841 to about 1850 are from those kept by Dr. Donaldson and his father of Pleasant Valley, a few miles above Davenport. Records from 1851 to 1871 are taken mainly from two sources, namely, C. H. Stoddard of Rock Island, Illinois, and Mr. Robins, Superintendent of the Government bridge at Davenport, Iowa. Some records seem to have been kept at Rock Island Arsenal and Dr. Donaldson also continued his during this time. The records since 1871 are those of the Signal Corps of the United States Army and the weather Bureau. The records have been compared where they parallel each other and preference given to those in agreement. When they show not more than one day's difference, they were considered in agreement since one observer may have observed the phenomena in the afternoon and the other may not have recorded it until next morning when making his river‐observation. Unusually long seasons of closed navigation and those of open navigation were checked with existing records of temperature and other reliable data. Thus the season of 1842–43 with 155 days of closed season was found to be very cold with a late cold spring.
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