The millibar, a unit of pressure, traces its origins back to the 1800s when it was introduced by the meteorologists Henry H. Hilderbrandsson and Vagn Walfrid Ekman. Used primarily in meteorology, the millibar found its place in daily weather reports around the world. Measuring atmospheric pressure in thousands, one millibar equates to 100 pascals in the SI system, providing a convenient scale for understanding variations in atmospheric conditions.
Intriguingly, the typical sea-level atmospheric pressure is about 1013 millibars. This is the weight of the air around us, controlled by a delicate balance of gases and climatic factors. During severe weather events, such as hurricanes, the central pressure can drastically drop to around 920 millibars, signifying powerful winds and storms. This makes the millibar not just a scientific measure, but a crucial tool for predicting and understanding weather patterns.
The torr is a unit of pressure named after the Italian physicist Evangelista Torricelli, who invented the barometer in the 17th century. It is defined as 1/760th of an atmosphere, approximating the pressure exerted by a one-millimeter column of mercury at 0 degrees Celsius. What makes the torr particularly interesting is its practical use in fields like vacuum technology and weather forecasting, where precise measurements of atmospheric pressure are crucial.
The legacy of Torricelli’s work is integral to meteorology and physics, as it opened paths for understanding atmospheric pressure. Beyond scientific circles, the torr is a reminder of human ingenuity in unraveling atmospheric mysteries and continues to play a vital role in today’s scientific advancements.
Millibar | Torr |
---|---|
0
mbar
|
0
torr
|
10
mbar
|
7.50062
torr
|
20
mbar
|
15.00123
torr
|
30
mbar
|
22.50185
torr
|
40
mbar
|
30.00247
torr
|
50
mbar
|
37.50308
torr
|
60
mbar
|
45.0037
torr
|
70
mbar
|
52.50432
torr
|
80
mbar
|
60.00493
torr
|
90
mbar
|
67.50555
torr
|
100
mbar
|
75.00617
torr
|
110
mbar
|
82.50679
torr
|
120
mbar
|
90.0074
torr
|
130
mbar
|
97.50802
torr
|
140
mbar
|
105.00864
torr
|
150
mbar
|
112.50925
torr
|
160
mbar
|
120.00987
torr
|
170
mbar
|
127.51049
torr
|
180
mbar
|
135.0111
torr
|
190
mbar
|
142.51172
torr
|
200
mbar
|
150.01234
torr
|
210
mbar
|
157.51295
torr
|
220
mbar
|
165.01357
torr
|
230
mbar
|
172.51419
torr
|
240
mbar
|
180.0148
torr
|
250
mbar
|
187.51542
torr
|
260
mbar
|
195.01604
torr
|
270
mbar
|
202.51665
torr
|
280
mbar
|
210.01727
torr
|
290
mbar
|
217.51789
torr
|
300
mbar
|
225.0185
torr
|
310
mbar
|
232.51912
torr
|
320
mbar
|
240.01974
torr
|
330
mbar
|
247.52036
torr
|
340
mbar
|
255.02097
torr
|
350
mbar
|
262.52159
torr
|
360
mbar
|
270.02221
torr
|
370
mbar
|
277.52282
torr
|
380
mbar
|
285.02344
torr
|
390
mbar
|
292.52406
torr
|
400
mbar
|
300.02467
torr
|
410
mbar
|
307.52529
torr
|
420
mbar
|
315.02591
torr
|
430
mbar
|
322.52652
torr
|
440
mbar
|
330.02714
torr
|
450
mbar
|
337.52776
torr
|
460
mbar
|
345.02837
torr
|
470
mbar
|
352.52899
torr
|
480
mbar
|
360.02961
torr
|
490
mbar
|
367.53022
torr
|
500
mbar
|
375.03084
torr
|
510
mbar
|
382.53146
torr
|
520
mbar
|
390.03208
torr
|
530
mbar
|
397.53269
torr
|
540
mbar
|
405.03331
torr
|
550
mbar
|
412.53393
torr
|
560
mbar
|
420.03454
torr
|
570
mbar
|
427.53516
torr
|
580
mbar
|
435.03578
torr
|
590
mbar
|
442.53639
torr
|
600
mbar
|
450.03701
torr
|
610
mbar
|
457.53763
torr
|
620
mbar
|
465.03824
torr
|
630
mbar
|
472.53886
torr
|
640
mbar
|
480.03948
torr
|
650
mbar
|
487.54009
torr
|
660
mbar
|
495.04071
torr
|
670
mbar
|
502.54133
torr
|
680
mbar
|
510.04194
torr
|
690
mbar
|
517.54256
torr
|
700
mbar
|
525.04318
torr
|
710
mbar
|
532.54379
torr
|
720
mbar
|
540.04441
torr
|
730
mbar
|
547.54503
torr
|
740
mbar
|
555.04565
torr
|
750
mbar
|
562.54626
torr
|
760
mbar
|
570.04688
torr
|
770
mbar
|
577.5475
torr
|
780
mbar
|
585.04811
torr
|
790
mbar
|
592.54873
torr
|
800
mbar
|
600.04935
torr
|
810
mbar
|
607.54996
torr
|
820
mbar
|
615.05058
torr
|
830
mbar
|
622.5512
torr
|
840
mbar
|
630.05181
torr
|
850
mbar
|
637.55243
torr
|
860
mbar
|
645.05305
torr
|
870
mbar
|
652.55366
torr
|
880
mbar
|
660.05428
torr
|
890
mbar
|
667.5549
torr
|
900
mbar
|
675.05551
torr
|
910
mbar
|
682.55613
torr
|
920
mbar
|
690.05675
torr
|
930
mbar
|
697.55736
torr
|
940
mbar
|
705.05798
torr
|
950
mbar
|
712.5586
torr
|
960
mbar
|
720.05922
torr
|
970
mbar
|
727.55983
torr
|
980
mbar
|
735.06045
torr
|
990
mbar
|
742.56107
torr
|
1000
mbar
|
750.06168
torr
|
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