Meteor(s)—continued 
radio observations, 362 
showers, 356 
radiants, radar observation, 362 
spectra, 357 
sporadic, 356 
stream velocities, radar observation, 
363 
streams, 356 
study, continuous-wave method, 363 
Doppler method, 363 
whistling meteor method, 363 
terminology, 356 
trails, radio echoes from, 257 
trains, winds and, 358 
upper atmosphere research and, 356 
visual observations, 357 
Meteoric phenomena, use in studying 
upper atmosphere, 251 
Meteoric process, theory of, 359 
Meteorite, 356 
Meteoroid, 356 
Meteorological analysis, 715 
centers, 716 
coordination of sea-level and upper- 
air, 720 
differential technique, 718 
frontal technique, 715 
isentropic, 725 
moisture charts in, 725 
prefrontal squall line, 716 
radiosondes and, 726 
techniques, 715 
transmission, 715 
upper air, 717 
upper-air technique, 715 
use of charts in, 721 
use of radar, 717 
Meteorological balloons see Balloons 
Meteorological instruments, 1207 
aircraft, 1223 
cloud and raindrop size, 1228 
humidity measurement, 1225 
liquid-water content measurement, 
1226 
pressure measurements, 1225 
special research, 1228 
snowflake and ice-crystal size meas- 
urement, 1229 
temperature measurement, 1223 
wind velocity measurement, 1226 
altitude measurements, 1226 
automatic weather stations, 1217 
balloons, 1214 
ceilometers, 1218 
parachute radiosondes, 1215 
radar-wind systems, 1213 
radarsonde systems, 1213 
radiosonde-radiowind systems, 1207 
techniques, 1207 
wire sondes, 1216 
general trends, 1219 
Meteorological optics, general, 61 
Meteorological organization, interna- 
tional, need for, 745 
Meteorological problems, nonlinear, 
method of characteristics, 421 
Meteorological recorder, 1213 
Meteorological research, model tech- 
niques, 1249 
Meteorological stations, 
equipment, 53 
Meteorological tool, ocean waves as, 
1090 
Meteorology, and river forecasting, 1053 
Arctic, 942 
cosmical, 377 
dynamic, problem of, 401 
equatorial see Equatorial meteorology 
and Tropical meteorology 
experimental, development, 229 
recent advances, 229 
relationship of snow to, 221 
marine, 1055 
actinometric 
INDEX 
perturbation equations in, 401 
polar, 915 
thermodynamics of open systems, ap- 
plication to, 531 
tropical see Tropical meteorology 
visibility in, 91 
Meteorotropism, 1120 
Methane content of atmosphere, 5 
future developments, 9 
Michelson actinometer, 53 
Microbarographs, 370 
Microclimate, 993 
as climate near ground, 994 
contour, 997 
dependent, 997 
eddy diffusion, 996 
effect of type of ground, 995 
forestry and, 1000 
in vegetation layer, 998 
independent, 997 
moisture conditions, 995 
temperature conditions, 994 
wind conditions, 996 
Microclimatological research, history, 
993 
origin, 993 
Microclimatology, 993 
agriculture and, 998 
applications, 998 
applied, artificial irrigation and, 999 
frost protection and, 999 
future problems, 998 
in city planning, 1001 
industry and, 1001 
phenology and, 1000 
present state of research, 994 
research, methodology of, 1001 
wind protection and, 999 
Microorganisms, counts, 1109 
in clouds, 1109 
Microseismic storm, 1312 
Microseisms, application to forecasting, 
causes, 1303, 1314 
effect of differences in earth crust on, 
1308 
effect of distance on period, 1308 
effect of earth faults on, 1308 
effect of ground on, 1309 
energy transmitted from surf, 1305 
in tropical cyclones, 900 
observations, 1303 
periods of pressure waves in the ocean, 
theoretical, 1307 
research needed, 1310 
short-period, 1315 
storm, 1313 
theory of, 1303 
theory of elastic wave propagation in 
the ground, 1307 
theory of wave propagation from sur- 
face of ocean to bottom, 1306 
theory of wave propagation from water 
to solid rock, 1306 
transmission of energy from meteoro- 
logical disturbances into the 
ground, 1304 
tripartite studies, 1312 
types, 1304 
typical records, 1303 
wave types observed in, 1307 
Midtroposphere flow patterns, prognosis, 
10 
Mirages, 66 
Mistral, 670 
Mixing-length hypothesis, in turbulent 
air flow, 494 
Mixing processes, in clouds, 200 
Moazagotl cloud, 669 
Model techniques, in meteorological re- 
search, 1249 
prototype simulation, 1250 
similitude requirements, 1249 
typical laboratory investigations, 1251 
1327 
Mold transport, in atmosphere, 1109 
Molds, origin of, 1109 
Moist-adiabatic process, prerequisites for 
ideal, 199 
ascending motions, 201 
descending motions, 201 
Moisture adjustment, cyclonic-adjust- 
ment method, 1040 
q-adjustment method, 1040 
thunderstorm-adjustment method, 
0 
Moisture, equations of continuity, 1037 
Molecular diffusion, 320 
Molecular forces, dipolar, 1132 
dispersion, 1133 
for condensation, 1132 
induction, 1133 
polar, 1132 
Molecular particles, 263 
see also Atomic particles 
Molecular processes, reversibility, 267 
Molecular transitions, spectra associated 
with, 264 
Molecules, mean free path, 369 
Méller’s diagram, 37 
Momentum, total angular; conservation 
of, 460 
Momentum-transport theory, 496 
Monochromatic absorption, in expo- 
; nential atmosphere, 265 
Moon, effect on Grosswetier, 819 
enlargement, when near horizon, 62 
Mountain building, and climate, 1013 
theory of, 385 
N 
Natural m-sec-v-amp system, 144 
Needle circuit, for electrometers, 144 
Needle frost, 207 
Neon content of atmosphere, 5 
Nephelometer, polar, 95 
Neptune, atmosphere, 394 
meteorological parameters, 392 
Neutral points, measurement of position, 
80 
Newton, theory of atmospheric oscilla- 
tions, 523 
Night-sky, aurora, 345 
emissions, altitude, 344 
further research needed, 345 
intensity, 342 
spectrum, 341 
wave lengths in, 342 
theory, 344 
variations, 342 
annual, 343 
diurnal, 343 
latitudinal, 343 
twilight effects, 343 
with zenith angle, 344 
light, variation, 258 
luminescence, use in studying upper 
atmosphere, 251 
radiations, from upper atmosphere, 341 
spectrum, need for more study, 258 
zodiacal light, 345 ; 
Nitric acid, atmospheric, determining, 
1127 
Nitrogen, atmospheric, determining, 
1131 
bands, inspectrum of aurorae, tempera- 
ture determination from, 351 
content of atmosphere, 5 
dioxide content of atmosphere, 7 : 
oxides, effect on condensation nuclei 
formation, 186 
Nitrous oxide content of atmosphere, 5 
Noctilucent clouds, use in studying 
upper atmosphere, 251 i 
Nocturnal cooling process, atmospheric 
radiation and, 40 
Nonadiabatic effects, dynamic forecast- 
ing and, 482 
