272 273 index

272

Ij\DEX

Ice (continiud) island, 247 kccl, 243

migration of salt in, 241,242 inovemcnt of, 244 multi-ycar, 240 nilas, 239

nomenclaturc, 239-244 northern hemisphere, 250 distribulion in scason ofleast extent, 251 of grcatcst cxtcnt, 252 distribution of fast icc, 253 pack, 242 pancakc, 239

paltem of breaking up, 256 ridge, 242

salt content of, 241, 242 sccond-year, 240 shuga, 239

Southern hemisphere, 254 distribution in scason ofleast extent, 255 of grcatcst cxtcnt, 256 young, 242 Icebcrgs, 245 Antarctic, 248

distribution of, 245 Arctic, 247

distribution of, 245 movcment of, 249 tabular, 248

Index correction, barometer, 21 Instability, atmospherie, 13 Intcnsification, of antieyelones, 179 of depressions (^edccpcning), 179 International codes, 184 Intertropical Convcrgence Zonę, 83, 113 Inversion, 11 Ionosphere, 4 Isallobar, 25 Isobars, 22

adjustment of, to fronts, 175 determination of wind from, 196 drawingof, 171 straight, 137

Katabatic drainage, fog due to, 62 winds, 87 Khamsin, 88

Land and sca brcczc, 86 Lapse ratę, 11

Latitudc, correction of barometer for, 21 Lee depression, 128 Lcvantcr, 88

Lightning, 57 Local winds, 87 Bora, 87 Etcsian, 88 Gregalc, 88 Harmattan, 88 Khamsin, 88 Levantcr, 88 Mistral, 88 Norther, 88 Pampcro, 89 Sirocco, 89 Shamal, 89 Southerly Buster, 89 Sumatra, 89 Tornado, 90 Low—see Depression Low pressure, trough of, 24, 134

Marinę Meteorological Atlases, 73 Maritimc-polar air mass, 108, 111

-tropical air mass, 108, 111 Marsdcn sąuarcs, 68 Mediterranean front, 113 Meteorological Atlases, 73 charts, 67

obscrvations, usc of, 67 organization, 182

Metcorology and Oceanography, inter-relation bctwccn, 262 Millibars, 19 Mist, 63 Mistral, 88 Mixing fog, 64 Monsoon, 85

Navigable semicircle, 157, 158 Nimbostratus, 54 Non-frontal depression, 127 Norther, 88

Numcrical forccasting, 180

Observations, pcrsonal and local fore-casting, 195 usc madę of, 67 Occlusions, 121 cold, 122 warm, 122

Ocean, importancc of in meteorological proccsscs, 262 Ocean weather stations, 70 Oceanography and Meteorolog)', inter-rclation bctwccn, 262 Octant of globc, 68 Orographic cloud, 50 Ozone, 2

Pack icc, 242 Pampero, 89 Pancakc icc, 239 Period, of waves, 39 Physical propcrtics, of atmosphere, 1 Plotting analysis, 191 ship and station reports, 190 symbols, 170 Point of rccurvaturc, 146 Polar front, 112 theory, 117 winds, 86

Pollution, smokC; 63 Polynyas, 253 Prccipitation, 55

distribution ovcr oceans, 97 Prcssurc:

and winds, 22 distribution, 22,82 diurnal variation, 24 cxcrted by wind, 38 generał rcmarks, 19 gradient, 22, 31, 196 barometrie, 19 ridge of high, 24 systems, 23,24 movementof, 177 tcndency, 25 usc of, 178 trough of low, 24 units of, 19 Prognosis, 177

Prognostic chart or map, 187 Punched cards, 71

Radar:

use of in fog, 65 useofin tropical storms, 155 Radiation: long-wavc, 4 short-wavc, 4 solar, 4

Radiation fog, 61

diurnal variation of, 62 local eflccts of, 62 Rain—see Prccipitation Rccurvaturc (of tropical storm), 146 Rclative humidity, 8 diurnal variation of, 11 measuccmcnt of—see hygrometers, 9 Ridge (of high pressure), 24 (icc), 242

Right-hand scmicirclc, 157

Safety scctor, 160

Salinity, cflect ofon freezing, 238

Sirocco, 89 Sca wavcs, 38

as opposcd to swell, 43 Sea breezes, 86 Sca fog:

distribution of, 100 forecasting, 197 Sca smokc, 64 Sea temperaturę: distribution, 95 forecasting, 197 Sccondary depressions, 23, 127 Shamal, 89 Ship routeing, 199 Sleet, 57 Smoke, 63 Snów, 56

Sound signals in fog, 65 Southcrly Buster, 89 Scjuall. 37

Stability of atmosphere, 12 Storm:

as description of wind forcc, facing 26 diflfercnce between tropical and higher latitudc, 140 tropical, 139 surge, 139

Strong winds, frcqucncv of, 91 Stratocumulus, 54 Stratosphere, 2 Stratus, 54 Subsidencc, 16 Subtropical high pressure, 86 scealso warm antieyelones, 133 Sumatra, 89 Swell, 43

Synoptic chart, 165 exampleof, 168 plotting—see representation of the data, 170 plotting analysis on, 191 usc of forecasting, 176

Tempera te zones, winds of, 86 Temperaturę: air, 4

air, distribution, 95 measurement of, 16 barometrie correction for, 20 diurnal variation, 10 factors controlling, 4 in relation to cargo carc, 17 lapsc ratę, 12

variation ovcr carth’s surfacc, 5

variation with hcight, 11

air and sea, difference between, 266