Knowledge (XXG)

Norwegian cyclone model

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229: 206: 160: 183: 137: 217: 194: 171: 148: 272: 125: 293:. Theory from the 1980s talked about the presence of a cold conveyor belt which originates north of the warm front and flows along a clockwise path (in the northern hemisphere) into the main belt of the westerlies aloft, but there has been conflicting evidence as to whether or not it actually exists. 279:
A conveyor belt, also referred to as the warm conveyor belt, describes the flow of a stream of warm moist air originating within the warm sector of an extratropical cyclone ahead of the cold front which slopes up above and north of the surface warm front. The idea of the conveyor belt originated in
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precipitation develops north of the warm front along the conveyor belt. Active precipitation north of the warm front implies potential for greater development of the cyclone. A portion of this conveyor belt turns to the right (left in the Southern Hemisphere), aligning with the upper level
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and warm fronts around the low become better defined. As the low matures, it couples with the upper level disturbance moving into the cyclone's cold sector. The cold front catches up to the westward portion of the warm front, forming an
88:, one ahead of the low and another trailing behind the low. The convergence line ahead of the low became known as either the steering line or the warm front. The trailing convergence zone was referred to as the 325: 263:. The frontal boundary becomes weaker and surrounds the equatorward portion of the cyclone, waiting for the next upper level disturbance to form a new low pressure area. 365: 280:
1969. The left edge of the conveyor belt is sharp due to the higher density air moving in from the west forcing a sharp slope to the cold front. An area of
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appeared to be focused along these convergence zones. The concept of frontal zones led to the concept of
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will begin to form ahead of the surface low, within the cold sector of the cyclone poleward of the
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A depiction of warm conveyor belt precipitation during a wintertime extratropical cyclone
256: 84:. This theory proposed that the main inflow into a cyclone was concentrated along two 73: 37: 242:, develops as an upper level disturbance moves towards that portion of the boundary. 477: 281: 260: 53: 464: 89: 81: 25: 286: 251: 247: 61: 57: 41: 97: 33: 77: 271: 216: 193: 170: 147: 270: 124: 49: 36:
develop as they move up and along a frontal boundary, eventually
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A wave along a frontal boundary, in the form of a broad area of
93: 76:, derived from a coastal network of observation sites in 44:cold environment. It was developed completely from 8: 314: 459: 457: 426:: CS1 maint: archived copy as title ( 419: 24:, developed during and shortly after 7: 340: 338: 92:or cold front. Areas of clouds and 72:Polar front theory is attributed to 465:Reexamining the Cold Conveyor Belt. 46:surface-based weather observations 14: 484:Synoptic meteorology and weather 250:. As the low deepens, both the 227: 215: 204: 192: 181: 169: 158: 146: 135: 123: 1: 346:The Norwegian Cyclone Model. 323:The Norwegian Cyclone Model. 222:Dissipating stage of cyclone 199:A mature low pressure system 48:, including descriptions of 30:Bergen School of Meteorology 20:development is known as the 16:The older of the models of 505: 351:September 1, 2006, at the 328:September 1, 2006, at the 107: 366:"Norwegian Cyclone Model" 68:Development of the theory 467:Retrieved on 2007-05-17. 463:University of Oklahoma. 451:Retrieved on 2007-05-17. 442:Norwegian cyclone model. 355:Retrieved on 2007-05-17. 344:University of Oklahoma. 332:Retrieved on 2006-10-11. 303:Surface weather analysis 22:Norwegian cyclone model 489:Extratropical cyclones 276: 370:oceanservice.noaa.gov 274: 117:Stages of development 110:Extratropical cyclone 18:extratropical cyclone 86:lines of convergence 153:Wave forms on front 32:. In this theory, 447:2016-01-04 at the 277: 60:above the surface 54:frontal boundaries 496: 468: 461: 452: 438: 432: 431: 425: 417: 415: 413: 407: 401:. Archived from 400: 392: 386: 385: 383: 381: 372:. Archived from 362: 356: 342: 333: 319: 231: 219: 208: 196: 185: 176:Wave intensifies 173: 162: 150: 139: 127: 504: 503: 499: 498: 497: 495: 494: 493: 474: 473: 472: 471: 462: 455: 449:Wayback Machine 439: 435: 418: 411: 409: 405: 398: 396:"Archived copy" 394: 393: 389: 379: 377: 364: 363: 359: 353:Wayback Machine 343: 336: 330:Wayback Machine 321:Shaye Johnson. 320: 316: 311: 299: 269: 236: 235: 234: 233: 232: 224: 223: 220: 211: 210: 209: 201: 200: 197: 188: 187: 186: 178: 177: 174: 165: 164: 163: 155: 154: 151: 142: 141: 140: 132: 131: 128: 119: 118: 112: 106: 70: 40:and reaching a 12: 11: 5: 502: 500: 492: 491: 486: 476: 475: 470: 469: 453: 433: 408:on 10 May 2017 387: 376:on 11 May 2009 357: 334: 313: 312: 310: 307: 306: 305: 298: 295: 268: 265: 257:occluded front 226: 225: 221: 214: 213: 212: 203: 202: 198: 191: 190: 189: 180: 179: 175: 168: 167: 166: 157: 156: 152: 145: 144: 143: 134: 133: 129: 122: 121: 120: 116: 115: 114: 113: 105: 102: 74:Jacob Bjerknes 69: 66: 42:barotropically 13: 10: 9: 6: 4: 3: 2: 501: 490: 487: 485: 482: 481: 479: 466: 460: 458: 454: 450: 446: 443: 437: 434: 429: 423: 404: 397: 391: 388: 375: 371: 367: 361: 358: 354: 350: 347: 341: 339: 335: 331: 327: 324: 318: 315: 308: 304: 301: 300: 296: 294: 292: 288: 287:westerly flow 283: 273: 267:Conveyor belt 266: 264: 262: 261:cold-core low 258: 253: 249: 245: 244:Precipitation 241: 230: 218: 207: 195: 184: 172: 161: 149: 138: 130:Initial stage 126: 111: 103: 101: 99: 95: 91: 87: 83: 79: 75: 67: 65: 63: 59: 55: 51: 47: 43: 39: 35: 31: 27: 23: 19: 436: 410:. Retrieved 403:the original 390: 380:25 September 378:. Retrieved 374:the original 369: 360: 317: 278: 240:low pressure 237: 71: 21: 15: 440:JetStream. 90:squall line 82:World War I 52:found near 28:within the 26:World War I 478:Categories 309:References 282:stratiform 248:warm front 108:See also: 98:air masses 62:warm front 58:cold front 104:Evolution 38:occluding 445:Archived 422:cite web 349:Archived 326:Archived 297:See also 94:rainfall 34:cyclones 412:10 June 80:during 78:Norway 50:clouds 406:(PDF) 399:(PDF) 428:link 414:2016 382:2023 291:snow 252:cold 480:: 456:^ 424:}} 420:{{ 368:. 337:^ 64:. 430:) 416:. 384:.

Index

extratropical cyclone
World War I
Bergen School of Meteorology
cyclones
occluding
barotropically
surface-based weather observations
clouds
frontal boundaries
cold front
warm front
Jacob Bjerknes
Norway
World War I
lines of convergence
squall line
rainfall
air masses
Extratropical cyclone










low pressure

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