Historical trends in lake and river ice cover in the northern hemisphere

Freeze and breakup dates of ice on lakes and rivers provide consistent evidence of later freezing and earlier breakup around the Northern Hemisphere from 1846 to 1995. Over these 150 years, changes in freeze dates averaged 5.8 days per 100 years later, and changes in breakup dates averaged 6.5 days per 100 years earlier; these translate to increasing air temperatures of about 1.2 degrees C per 100 years. Interannual variability in both freeze and breakup dates has increased since 1950. A few longer time series reveal reduced ice cover (a warming trend) beginning as early as the 16th century, with increasing rates of change after about 1850.

[1]  M. Yoshino,et al.  RE‐EXAMINATION OF THE CLIMATIC CHANGE IN CENTRAL JAPAN BASED ON FREEZING DATES OF LAKE SUWA , 1982 .

[2]  Alan H. Shapley,et al.  World data centers , 1982 .

[3]  J. Magnuson,et al.  Lake ice records used to detect historical and future climatic changes , 1992 .

[4]  D. Robertson,et al.  Changes in winter air temperatures near Lake Michigan, 1851‐1993, as determined from regional lake‐ice records , 1995 .

[5]  J. M. Gregory,et al.  Climate response to increasing levels of greenhouse gases and sulphate aerosols , 1995, Nature.

[6]  S. Vavrus,et al.  Measuring the sensitivity of southern Wisconsin lake ice to climate variations and lake depth using a numerical model , 1996 .

[7]  Mark Rounsevell,et al.  Climate Change 1995: impacts, adaptations and mitigation of climate change: scientific-technical analyses. Contribution of Working Group II to the Second Assessment Report of the Intergovernmental Panel on Climate Change , 1996 .

[8]  J. Magnuson,et al.  Evidence of recent warming and El Niño‐related variations in ice breakup of Wisconsin lakes , 1996 .

[9]  T. M. Lillesand,et al.  Determinants of temporal coherence in the satellite‐derived 1987–1994 ice breakup dates of lakes on the Laurentian Shield , 1996 .

[10]  David M. Livingstone,et al.  Break-up Dates of Alpine Lakes As Proxy Data for Local and Regional Mean Surface Air Temperatures , 1997 .

[11]  C. Cushing.  PREFACE: FRESHWATER ECOSYSTEMS AND CLIMATE CHANGE IN NORTH AMERICA , 1997 .

[12]  Freshwater Ecosystems and Climate Change in North America: A Regional Assessment , 1998 .

[13]  A. Timmermann,et al.  Increased El Niño frequency in a climate model forced by future greenhouse warming , 1999, Nature.

[14]  Laurence C. Smith,et al.  TRENDS IN RUSSIAN ARCTIC RIVER-ICE FORMATION AND BREAKUP, 1917 TO 1994 , 2000 .

[15]  Gao,et al.  Northridge earthquake damage caused by geologic focusing of seismic waves , 2000, Science.