Anomalous peak in Antarctic sea‐ice area, Winter 1998, coincident with ENSO

Observations: Cryosphere

“…Hanna (2001) provided an analysis of sea ice cover based on SSM/I data for 1987-1999 and found "an ongoing slight but significant hemispheric increase of 3.7 ± 0.3% in extent and 6.6 ± 1.5% in area." utilized satellite passivemicrowave data to map the length of the sea-ice season throughout the Southern Ocean for each year of the period 1979-1999, finding a "much larger area of the Southern Ocean experienced an overall lengthening of the sea-ice season … than experienced a shortening."…”

“…Comparison with regional data led Taurisano et al to conclude the Nuuk Fjiord climatic history is similar to that recorded at many other stations throughout south and west Greenland (cf. Humlum, 1999;Hanna andCappelen, 2002, 2003).…”

Are observed changes in the concentration of carbon dioxide in the atmosphere really dangerous?

“…Thus, if IPCC models are correct, we should see the poles warming relative to the tropics. Hanna (2001), using satellite analysis of Antarctic sea-ice cover (extent and area) based on Special Sensor Microwave/Imager data for the period October 1987 to September 1999, shows an ongoing slight but significant hemispheric increase of 3.7(±0.3)% in ice extent and 6.6(±1.5)% in area. In fact, recent data have shown that Antarctica has cooled significantly (Doran et al, 2002).…”

Influence of climatic teleconnections on the temporal isotopic variability as recorded in a firn core from the coastal Dronning Maud Land, East Antarctica

“…Snow/ice records from Antarctica were widely used to understand the recent climate variability and the various linking mechanisms (Hanna 2001;Kwok and Comiso 2002b;Fogt and Bromwich 2006;Gregory and Noone 2008;Divine et al 2009). However, only a few studies have been conducted on coastal regions of Dronning Maud Land (Isaksson et al 1996;Nijampurkar et al 2002;Thamban et al 2006;Masson-Delmotte et al 2008;Divine et al 2009).…”