Study On Meteorological Elements And Possible Mechanisms Affecting Aircraft Hourly Fuel Consumption

In the case of global warming,changes in temperature at the cruising level have a crucial impact on aviation flight.In order to analyze the meteorological factors affecting the hourly fuel consumption of the aircraft—the degree of influence of temperature on fuel consumption,it is developed for the civil aviation department.Provide reference for decision-making and early adoption of adaptive countermeasures to mitigate the adverse effects of global climate change on the aviation industry.This paper uses the National Center for Atmospheric Sciences and the Environmental Prediction Center(NCEP/NCAR)to reanalyze data using empirical orthogonal functions.Decomposition(EOF)method and Morlet wavelet analysis method are used to obtain the spatial and temporal distribution characteristics and variation characteristics of the annual mean temperature field and the average temperature field of the four seasons in nearly 40 years of Northern Hemisphere 250 hPa,and analyze the fuel consumption characteristics of the aircraft on which it is flying.The conclusions are as follows:(1)The spatial distribution of the 250 hPa temperature in the northern hemisphere is affected by latitude and other factors.The average temperature is between 217 k and 232 k.The high value center is in the low latitude area,and the low value center appears in the upper part of the Eurasia in the upper part of Siberia in central Russia.The temperature above the land.The change is larger than the ocean,and the average temperature gradient is the largest in the mid-latitude region.From the perspective of each season,the warming trend in winter and summer is significantly higher than that in spring and autumn.Most of the northern hemisphere in summer is in the warming zone,and the temperature rise at high latitudes in winter is obvious,and there are reverse changes in high latitudes and middle and low latitudes.It is worth noting that the temperature changes near the polar regions at high latitudes are special,and the four seasons show different trends of temperature rise and fall,and the temperature of the temperature rise and fall is also large.(2)The average temperature change at the cruising level mainly occurred in the two periods around 1980 and around 2013,and the seasonal temperature abrupt change was consistent with the annual average temperature abrupt time.The annual average temperature has obvious fluctuations on the time scale of 12,6 and 3 years,and the positive and negative phases alternately appear,and there are three main oscillation periods.The 250 hPa temperature in the northern hemisphere has the strongest oscillation period on the time scaleof 12 years,which is the first main period;the oscillation period of the time scale of 3 years is the second main period;the 6-year time scale period oscillation is the third main period.(3)The hourly fuel consumption contour of the aircraft is generally a closed curve parallel to the latitude,which generally corresponds to the decrease from low latitude to high latitude.The hourly fuel consumption of the aircraft on land varies with the latitude larger than the ocean,and at mid-latitude The fuel consumption in the continental European region is the most obvious with the latitude.The hourly fuel consumption in the same area in summer is significantly higher than the other three seasons,and the hourly fuel consumption in winter is the least.The places with the least hourly fuel consumption are in the high latitudes of the mainland,mainly in the Siberian region,while the highest values occur in the low latitudes,and the specific locations vary with the seasons.(4)In the four seasons,the hourly fuel consumption of the aircraft was significantly higher than that of the reduced area,and the rising area was concentrated in the middle and low latitudes,with an average of 2 pounds per decade.The reduced area mainly occurs in high latitudes.The change of hourly fuel consumption in spring and autumn is not obvious.In summer,except for high latitudes,the hourly fuel consumption in most areas of the northern hemisphere is increasing,while the increase in hourly fuel consumption at high latitudes in winter is obvious.In the high latitudes,the ups and downs of the four seasons are complex,the summer and winter rise and fall rates are significantly higher than that of spring and autumn,and most of the summers show a downward trend,with a maximum of 6 pounds/ten,and most of the winter The upward trend is up to 8 pounds per decade.(5)The correlation and influence between temperature and aircraft hourly fuel consumption are: spring,positive correlation at high latitudes,and negative correlation at middle and low latitudes.In summer,there is a high correlation and a negative correlation in the middle and low latitudes except the Pacific Ocean.There is a high negative correlation in the north of the 80° north latitude,in the autumn,in the high latitudes and in the northeastern part of the Eurasian continent.Northern Canada has a high positive correlation.In winter,it has a high positive correlation at high latitudes,and a high negative correlation at low latitudes and over the ocean.At mid-latitude Eurasia and North There is a high positive correlation between the areas of the American continent.