ISSN:0035-9009    

DOI:10.1002/qj.49707030301

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030302

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractThe variations of the ozone content of surface air during depressions have been investigated. Three definite conditions were found to occur, apparently without exception.A drop in the ozone content is found up to 300 miles in advance of warm fronts, with high values of ozone after their passage.An occluded front of the warm front type behaved in exactly the same way as a front with a warm sector.A drop in the ozone content is found after the passage of backbent occlusions, persisting until the front has moved on up to 200 miles, after which the ozone returns to its normal concentration.This seems to indicate that the observed change under these conditions in the ozone content is due to the increased stability of air not at the surface but at the upper warm front inversion. This would prevent the ozone (constantly destroyed near the ground) from being restored by turbulent interchange with air from greater heights.

ISSN:0035-9009    

DOI:10.1002/qj.49707030303

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030304

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030305

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractRecords of temperature over a 13‐year period in a Hertfordshire valley which has been described as possessing the most “continental” thermal climate yet investigated instrumentally in the British Isles are summarised, discussed, and compared with data from other stations. Among the facts brought to light are that only two of the 156 calendar months from 1930 to 1942 passed without ground frost on the valley floor; that screen frosts occur even in July and August; and that the mean night minimum temperature is at or below 32°F. for about three‐fifths of the year on the grass and for about two‐fifths of the year in the screen. Three examples of a diurnal range slightly exceeding 50°F. are examined in the light of Fourier analysis; statistical evidence is advanced to show that the probable limiting value for such ranges over a long series of years may be put at not less than 55–56°F. Thermograms are reproduced illustrating the greatest recorded daily variations, as well as the effects of katabatic winds and turbulence

ISSN:0035-9009    

DOI:10.1002/qj.49707030306

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030307

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030308

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030309

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49707030310

出版商:John Wiley&Sons, Ltd    

年代:1944

数据来源: WILEY