Ablation 1,416 Absolute age 3,240 Accidents 760 Acclimatization 1,525 Accuracy 1,936 Acoustical methods 646 Acoustic measurement 1,133 Active layer 2,900 Adaptation 657 Aerial photography 1,168 Aerial surveys 3,028 Aerosols 3,859 Age determination 2,362 Agriculture 1,075 Air 1,506 Airborne methods 1,327 Airborne radar 765 Aircraft 653 Aircraft icing 1,693 Air flow 667 Air ice water interaction 1,104 Air pollution 2,026 Air temperature 3,864 Air water interactions 823 Albedo 2,365 Algae 3,519 Algorithms 887 Aliphatic hydrocarbons 1,259 Alkaline earth metals 1,236 Alkanes 1,231 Alluvium 822 Alpine environment 1,392 Alpine glaciation 715 Alpine landscapes 3,225 Alpine tundra 567 Altimetry 746 Altitude 927 Analysis (mathematics) 7,111 ANALYSIS (MATHEMATICS) 819 Ancient ice ages 619 Animals 1,628 Annual variations 1,562 Antarctica--Amundsen-Scott Station 1,041 Antarctica--Antarctic ice sheet 1,297 Antarctica--Antarctic Peninsula 2,671 Antarctica--East Antarctica 2,161 Antarctica--King George Island 1,297 Antarctica--McMurdo Sound 765 Antarctica--McMurdo Station 637 Antarctica--Queen Maud Land 990 Antarctica--Ross Ice Shelf 615 Antarctica--Ross Sea 800 Antarctica--Showa Station 1,463 Antarctica--South Pole 778 Antarctica--South Shetland Islands 712 Antarctica--Terra Nova Bay 712 Antarctica--Transantarctic Mountains 733 Antarctica--Victoria Land 1,439 Antarctica--Vostok Station 972 Antarctica--Weddell Sea 1,568 Antarctica--West Antarctica 1,114 Antarctic Circumpolar Current 563 Antarctic Ocean 2,749 Antarctic regions 6,021 Antarctic Treaty 1,454 Arctic environment 1,067 Arctic landscapes 1,032 Arctic Ocean--Barents Sea 554 Arctic region--Svalbard 727 Areal geology 614 Arthropoda 1,769 Arthropoda--Crustacea--Exploitation 722 Arthropoda--Crustacea--Geographic distribution 658 Arthropoda--Crustacea--Physiology 633 Arthropoda--Crustacea--Population 671 Artificial freezing 1,077 Asia--Siberia 1,104 Asia--Tibetan Plateau 747 Assemblages 1,278 Atlantic Ocean--North Atlantic 807 Atmosphere 5,346 Atmosphere--Chemistry 2,312 Atmosphere--Circulation 1,674 Atmosphere--Pollution 604 Atmosphere--Pressure 583 Atmosphere--Temperature 1,909 Atmospheric boundary layer 680 Atmospheric circulation 3,250 Atmospheric composition 2,767 Atmospheric physics--Instruments 708 Atmospheric precipitation 6,334 Atmospheric pressure 1,422 Attenuation 639 Aurora 564 Avalanche forecasting 1,374 Avalanche formation 1,143 Avalanche mechanics 1,339 Avalanches 3,718 Avalanche triggering 614 Aves 1,567