ISSN:0035-9009    

DOI:10.1002/qj.49706829501

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractMeteorological observations have been kept lor three years 1937–40 on the exposed summit of Dun Fell in the Northern Pennines, including a continuous record of temperature. In a semi‐maritime climate this mountain station at 2,735 ft. is well above the tree‐line and conditions are at times severe. Estimates of the longer‐period averages are made for several climatic elements and compared with those from summit stations elsewhere. It is emphasised that over longer periods of time considerable variations in the upland climate are likely to occur as a result of small changes in the average distribution of pressure and that these will react considerably upon the vegetation. Although this record was initiated for other reasons and is unpretentious in scope it may be added that this is the first series of “mountain” observations to become available

ISSN:0035-9009    

DOI:10.1002/qj.49706829502

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49706829503

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractThe rǒle of mixing in the production of fogs and clouds has been the subject of frequent discussions, and many authors contend that turbulent mixing is an important factor in the formation of fog. This result is derived from the well‐known Bezold effect and supported by observations showing that fogs sometime occur together with winds of considerable strength. The writer (1939, 1940, 1941) has maintained that turbulent mixing tends to prevent fogs from forming and dispel existing fogs. The aim of this paper is to evaluate the amounts of condensation caused by mixing under various atmospheric conditions. Throughout it will be assumed that the air contains a sufficient amount of condensation nuclei, with the result that no appreciable supersaturation can be maintain

ISSN:0035-9009    

DOI:10.1002/qj.49706829504

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

摘要:

AbstractThe main object of this paper is to present a number of characteristic values of the auto‐correlation coefficient as actually computed from observed series of temperature and pressure. For this purpose the temperature and pressure records of some South African stations were selected.In the case of temperatures, it was found that, provided any daily or seasonal fluctuations are first eliminated and the standard deviation is constant, the coefficient of auto‐correlationR' has the analytic formR' =e‐ky, in whichkis a constant andyis the time‐lag. If, however, there is a marked variation in the standard deviation, such as is nearly always present in hourly values of temperature,R' is a function not only of the time‐lag, but also of the actual times marking the beginning and end of the time‐lag under consideration.In the case of a series of pressure readingsR' is not a simple exponential function, but may contain one or more damped har

ISSN:0035-9009    

DOI:10.1002/qj.49706829505

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49706829506

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49706829508

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49706829509

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49706829510

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY

ISSN:0035-9009    

DOI:10.1002/qj.49706829511

出版商:John Wiley&Sons, Ltd    

年代:1942

数据来源: WILEY