INDFX 



National Council of Economic Advisors, 



India, 217 

 National Hail Modification Program, 



(NSF), 155 

 National Hail Research Experiment 



(NHRE), (NSF), 151, 155, 156 

 National Hail Suppression Field Test, 



(NSF), 153, 155 

 National Hurricane Center, (NOAA), 125 

 National Hurricane Research Laboratory, 



(NOAA), 130 

 National Marine Fisheries Service, 



(NMFS), (NOAA), 87, 253 

 National Maritime Commission, U.S., 189 

 National Meteorological Center, 



Wash., D. C, 139 

 National Oceanic and Atmospheric 



Administration (NOAA), 13, 16 

 modeling, 66, t>8, 81, 82, 87 

 project STORMFURY, 128 

 see also Geophysical Fluid Dynamics 



Laboratory; National Hurricane Center; 



National Hurricane Research Labora- 

 tory; National Marine Fisheries 



Service; National Severe Storm 



Forecast Center; National Severe 



Storms Laboratory; National Weather 



Service; Space Environment Laboratory 

 National Park Service, U.S., 304 

 National Science Foundation (NSF), 



Fig. VI-11 

 see also National Hail Modification 



Program; National Hail Research 



Experiment; National Hail Suppression 



Field Test 

 National Severe Storm Forecast Center, 



(NOAA), 138 

 National Severe Storms Laboratory, 



(NOAA), 138, Fig. V-8 

 National University, Taipei, Taiwan, 185 

 National Weather Service, (NOAA), 81, 



Fig. IV-9, 102, 103, 136, 138, 141, 168, 



171, 197 

 Natural enemies of pests, 350, 351, 352, 



353, 354, 355, 356 

 Natural factors 



in climatic change, 63, 64 

 contaminants, 329, 330 

 Natural gas, 33, 357 

 Natural selection, 72, 373-378, 383 



pests and pesticides, Fig. X— 11, 354 

 Naval Electronics Laboratory Center, 



San Diego, Cal., 109 

 Navy, U.S., 81, 102, 128 

 NCAR, see National Center for 



Atmospheric Research 

 Negro, 376, 377 

 Nepal, 379 

 Nephelometer, 330 

 Netherlands, 339 

 Nevada, 29, 31, 204 

 New England 



data measurement, 31 

 drought, 165 

 severe storms, 133 

 urbanization, 119 

 New Guinea, 43 

 New Hampshire, 293 



New Jersey, 336 



New Mexico, 31, 74, 204 



New Orleans, La., 135 



New York, 38, 53, 119, 336, 362 



New Zealand, 33, 35, 44, Fig. VII-8 



NHRE, see National Hail Research 



Experiment 

 Niagara 

 falls, 262 

 river, 254, 255 

 Nicaragua, 43 

 Nickel sulfide ores, 31 

 Nigeria, 192 

 Nile River, 296 

 Nitrogen 

 as fertilizer 



in agriculture, 215 

 in forest areas, 209 

 cycles, 282 



enrichment of lake waters, 226, 228, 

 268, 272 

 Lake Washington, Fig. VIII-17 

 forests, 300 



in soil of tropical forests, 295 

 in the air, 329 

 nitrogen oxides 



air pollution, 320, 337, 388, 390 

 contaminants, 322 

 in groundwater, 200 

 in Lake Washington, 272 

 in rivers, Fig. VIII— 15 

 mesophere, 12 

 Nitrogen fixing 



burned-over soils, 310 

 Nitrogen-fixing plants, 208 



trophic dynamics, 227 

 NMFS, see National Marine Fisheries 



Service, U.S. 

 NOAA, see National Oceanic and 

 Atmospheric Administration 

 Noise and vibrations: effects of exposure, 



326 

 North America 

 air-sea system, 86 

 climatic change, 53, 55, 57, 73 

 drought, 167 



earth processes, 30, 31, 35, 44 

 ecosystems, 286 

 pollution, 267 

 severe storms, 160 

 urbanization, 226 

 water resources, 291, 294 

 weather forecasting, Fig. IV-9, 115, 119 

 North Carolina, 309 

 North Sea, 33, 79, 81 

 Northern hemisphere 



climatic change, Fig. Ill— 4, 61 

 monsoon winds, 184 

 temperature variation, Fig. Ill— 8, 



Fig. III-9, Fig. 111-10 

 weather forecasting, 90, Fig. IV-7, 

 98, 101 

 Norway, 78, 241, 246 

 Norwegian Sea, 78, 102, 103, 104 

 NSF, see National Science Foundation 

 Nuclear reactors 



effects on water quality, 231 

 estuaries, 248 



lakes, 259, 268 

 oceans, 245 



see also Heat; Power 

 Nucleating agents, 174 



cloud seeding, 176 



effect on hurricanes, 191, 193 



fog dispersal, 180, 181, 182, 183 



1,5-dehydroxynaphthalene, 174 



see also Ice: crystals; Silver iodide 

 Nuclei 



condensation, Fig. X-6 



freezing, 117, 118, 174 



hygroscopic, 153 



ice, 153, 170, 171, Fig. VI-7, 181, 182, 193 



precipitation, Fig. VI-2, 170, 329 



see also Cloud seeding 

 Nuees ardentes, see Glowing avalanches 

 Nufioa Indians, Fig. XI-6 

 Nutrients 



forest ecosystem, 292, Fig. IX-9, 295, 

 301,311 



Great Lakes, 269, 270 



Lake Washington, 271, 272 



tundra ecosystem, Fig. IX-16 

 Nutrition 



human, at high altitudes, 382, 383, 385 



plant 



crop production, 215 

 forest streams, 208, 209 

 phytoplankton, 234 



requirements for aquaculture, 251 

 Nyamuragira Volcano, Africa, 44 



Oasis effect: water cycle, 202 

 Observatories 



for solar activities, 15, 17 



seismographic stations, 23 

 Ocean-atmosphere system, 77-120, 287 



BOMEX project, 125 



drought prediction, 165 



marine contamination in, 357-360 



models, 65-72 



monsoons, 186 



phytoplankton and, 233 



weather forecasting and, 101 

 Oceanography, 254 



role in weather forecasting, 82, 100 

 Oceans 



basins, 26 



COj sink, 358 



circulation, 77-88, Fig. IV-2, Fig. IV-3, 

 234 

 models, 68 



currents, 78, 79, 83, 84 



floor 



Globigerina ooze, 53 

 oil on, 362 



formation, 21, 24 



heat sink, 257 



source of carbon monoxide, 330 



surface, 52, Fig. III-2, 58, 64, 100 



thermal pollution, 34 



tropical areas, 189 



weather predicting over, 96 

 Ogallala Formation, 204 

 Ohio, 69 



413 



