Ablation 1,666 Absolute age 4,895 Accidents 751 Acclimatization 1,515 Accuracy 1,876 Acoustical methods 888 Acoustic measurement 1,265 Active layer 2,805 Adaptation 669 Aerial photography 1,313 Aerial surveys 2,999 Aerosols 3,751 Age 630 Age determination 2,973 Agriculture 1,088 Air 1,598 Airborne methods 1,525 Airborne radar 769 Aircraft 647 Aircraft icing 1,691 Air flow 662 Air ice water interaction 1,011 Air pollution 1,897 Air temperature 3,595 Air water interactions 749 Albedo 2,357 Algae 4,108 Algorithms 938 Aliphatic hydrocarbons 1,499 Alkali metals 670 Alkaline earth metals 1,834 Alkanes 1,462 Alluvium 746 Alpine environment 1,627 Alpine landscapes 3,218 Altimetry 770 Altitude 960 Analysis (mathematics) 7,008 ANALYSIS (MATHEMATICS) 781 Ancient ice ages 782 Animals 1,666 Annual variations 1,657 Antarctica--Amundsen-Scott Station 972 Antarctica--Antarctic ice sheet 1,486 Antarctica--Antarctic Peninsula 2,922 Antarctica--East Antarctica 2,649 Antarctica--King George Island 1,377 Antarctica--McMurdo Station 627 Antarctica--Queen Maud Land 1,090 Antarctica--Ross Ice Shelf 653 Antarctica--Showa Station 1,365 Antarctica--South Pole 835 Antarctica--South Shetland Islands 743 Antarctica--Terra Nova Bay 730 Antarctica--Transantarctic Mountains 863 Antarctica--Victoria Land 1,717 Antarctica--Vostok Station 955 Antarctica--Weddell Sea 1,294 Antarctica--West Antarctica 1,318 Antarctic Circumpolar Current 596 Antarctic Ocean 4,775 Antarctic regions 6,022 Antarctic Treaty 1,431 Applications 1,037 Aquifers 623 Arctic environment 1,394 Arctic landscapes 806 Arctic Ocean--Barents Sea 724 Arctic Ocean--Beaufort Sea 827 Arctic Ocean--Kara Sea 607 Arctic region--Svalbard 833 Areal geology 1,096 Arthropoda 2,027 Arthropoda--Crustacea--Exploitation 718 Arthropoda--Crustacea--Geographic distribution 632 Arthropoda--Crustacea--Physiology 628 Arthropoda--Crustacea--Population 670 Artificial freezing 995 Asia--Siberia 1,294 Asia--Tibetan Plateau 772 Assemblages 1,638 Atlantic Ocean--North Atlantic 1,022 Atlantic Ocean--South Atlantic 642 Atmosphere 5,986 Atmosphere--Chemistry 2,004 Atmosphere--Circulation 1,600 Atmosphere--Temperature 1,753 Atmospheric boundary layer 665 Atmospheric circulation 2,994 Atmospheric composition 2,366 Atmospheric physics--Instruments 688 Atmospheric precipitation 7,519 Atmospheric pressure 1,420 Attenuation 655 Avalanche forecasting 1,340 Avalanche formation 1,101 Avalanche mechanics 1,292 Avalanches 3,852 Avalanche triggering 600 Aves 1,608