N-15/N-14 353 Naleds 641 NALEDS 104 N-alkanes 62 Nannofossils 315 Napier Complex 141 National interests 583 National parks 158 Natural analogs 96 Natural dams 291 Natural gas 1,243 Natural hazards 391 Natural remanent magnetization 131 Natural resources 1,149 Navigation 1,198 Navigation--Air 91 Navigation--Sea 241 Nd-144/Nd-143 277 Near-infrared spectra 93 Nearshore environment 173 Neodymium 314 Neogene 2,009 Neoglacial 1,103 Neogloboquadrina 200 Neogloboquadrina pachyderma 185 Neon 100 Neoproterozoic 652 Neoptera 288 Neornithes 822 Neotectonics 363 Nesosilicates 674 Networks 123 Neumayer Station 62 Neural networks 150 Neutron scattering 99 New methods 116 New taxa 612 New Zealand--North Island 82 New Zealand--Southern Alps 125 New Zealand--South Island 328 Nickel 153 Nitrate ion 392 Nitrates 268 Nitric acid 78 Nitrification 57 Nitrogen 1,409 Nitrogen cycle 92 Nitrogen dioxide 58 Nitrous oxide 214 Nivation 267 NMR spectra 87 NOAA 86 Noble gases 495 Nodules 85 Noise 129 Noise (sound) 121 Nomenclature 249 Nomographs 57 Normal faults 77 North 98 North America--Glacier National Park 75 North America--Saint Elias Mountains 116 North America--Saint Lawrence River 80 North America--Yukon River 80 North Atlantic Deep Water 321 North Atlantic Ocean 585 North Atlantic Oscillation 461 Northern Alaska 1,396 Northern Canada 104 Northern Finland 118 Northern Quebec 87 Northern Sea Route 541 Northern Sweden 206 Northern Victoria Land 61 Northwestern China 69 Northwest passage 68 Norway--Northern Norway 162 Norway--Southern Norway 177 Norway--Spitsbergen 557 Norway--Svalbard 251 Norwegian Sea--Voring Plateau 66 Nothofagus 62 Nototheniidae 109 NSF 70 Nuclear explosions 85 Nuclear magnetic resonance 126 Nuclear power 181 Nucleating agents 324 NUCLEATING AGENTS 146 Nucleation 230 NUCLEATION 80 Nucleation rate 115 Nuclei (Ice crystal) - Formation 58 Numerical analysis 584 Numerical models 4,187 Nunataks 196 Nutrient cycle 1,049 Nutrients 1,635 Nutrition 266 Ny Alesund 139