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美国作业代写:Cloud observation

2017-10-31 来源: 51due教员组 类别: Essay范文

下面为大家整理一篇优秀的essay代写范文- Cloud observation,供大家参考学习,这篇论文讨论了云状的观测。云的形成和演变是大气错综复杂的物理过程的具体表现之一。云状的观测对于分析未来天气演变有着重要意义。云的观测依靠观测员目测,所以观测员的理论水平、实际经验、工作态度是影响云状测质量的主要因素。而云的观测包括判定云状、估计云量、测定云高和选定云码。

Cloud observation,云状观测,essay代写,paper代写,美国作业代写

In the current ground monitoring work, most meteorological elements have been using automatic instrument observation, weather phenomena and visibility in some meteorological stations also have instruments to observe, so far the use of instruments for cloud observation in the meteorological station can not be achieved, can only rely on the observer visual. Based on the practical experience of many years of ground-based meteorological observation, this paper classifies and summarizes several problems in cloud observation, analyzes the causes of the problem and puts forward some solutions. Hope to the station to improve the quality of the observation of clouds help.

The formation and evolution of clouds is one of the concrete manifestations of the intricate physical processes of the atmosphere. Cloud-like observations are important for analyzing future weather evolution. The observation of the cloud depends on the observer, so the theoretical level, practical experience and working attitude of the observer are the main factors affecting the quality of cloud-like measurement. Cloud observation includes judging cloud shape, estimating cloud cover, measuring clouds height and selected cloud code, this paper summarizes and analyzes 4 items of cloud observation in the light of many years work practice, for reference of the peers.

Accurate determination of cloud shape is the key to observing clouds, which directly determines whether the cloud is correct or not. Frequently asked questions include the following:

Some observers make it easier to observe and make fewer error records. A variety of clouds only record the main 1 or 2 species, the amount is negligible, and the unusual indicative cloud disappears from the gas book. From the cloud-like records in recent years, the main clouds are Cidens, CS, Actra, ACOP, Low: Cb, Cu, Sc, Fn, other clouds rarely remember. When there is precipitation, thunderstorm convection weather is CB, SCCUG2 kind, ordinary precipitation is Acop, Fn, record pattern and randomness is very strong. This phenomenon is very common in some stations, the reason is that the observer is not strong sense of responsibility, technology is not perfect, afraid of causing trouble, afraid of others, so that the cloud's record is untrue.

Cloud Evolution is a continuous process, the observation cloud must consider affecting the local weather system, from the occurrence and development of the cloud system and combined with the weather phenomenon to judge. For example, no thunderstorm without lightning in the convective weather, cumulonimbus hidden behind other clouds, when the observer is generally not easy to determine whether for convective clouds, easy to miss. In view of this situation, the observer should be aware of the weather forecast in advance to know the weather situation. can also use radar, satellite cloud, the surrounding area station rainfall and temperature factors, such as a variety of auxiliary means to judge the development of the weather situation, pay attention to the sky, correct judgement cloud shape.

Night light is not good, so the observation of the night cloud is not as intuitive as it is during the day, and some of the observer records are not accurate. The main performance in: To correctly determine the night cloud, in the evening should pay attention to: first carefully observe the distribution of the sky clouds, to understand the evening cloud development and change law, do know, for night cloud observation laid the foundation. After nightfall, the cloud changes should be carefully monitored. Before observation, wait for the 5~10min in the dark, and then begin to observe after the eye adapts. Do not observe in the light, the moonlight is brighter, the cloud whiter height higher, the cloud blacker height lower. Moonlight Dim or No Moonlight, according to the visual, combined with the density of starlight, fuzzy degree can determine whether the sky has clouds and the thickness of clouds. It should be combined with the changes of weather and meteorological elements to judge the types of clouds.

At present, the detection environment of stations has been damaged by different degrees, and the surrounding shelters have been increased. Some observers estimate that cloud cover is incorrect only from the visible part of the sky. The observation cloud should be as far as possible to see all the sky and horizon. When the shelter is obscured, it is judged by the gap of the trees and the space of the building as far as possible. When the sky is obscured by precipitation, this part should be considered as a precipitation cloud system to estimate cloud cover.

When you record both SCOP and a cop, it is wrong to assume that the cloud cover must be 10 as long as it appears. In the code, it is clear that the cloud is "sometimes not necessarily full of the whole day"; in Acop's cloud cover records can also be recorded as "10-". The layered cloud must remember 10, and the actual views are wrong, from the cloud's generative principle and evolution process to see that the cloud cover changes in the development and movement of the layered clouds. Therefore, in the cloud observation should eliminate the cloud record in the mind to form a fixed pattern, but should be based on the actual situation of the sky to produce cloud cover.

Now most stations do not have the conditions of high cloud measurement, the cloud high observation is mainly visual. The observer formed a pattern, and the cloud was in full accordance with the cloud-like record. Although cloud shape is the main basis to determine cloud height, cloud height is influenced by water vapor condition, season, terrain and other factors. A station often appears to be SC Cloud high all year round is recorded as 1000~1200m, the Ac Cloud High is recorded as 3000m, Ci Cloud High is recorded as 6000m phenomenon, this ignores other factors. The general cloud is higher than the summer, sooner or later than noon, moving clouds below the stationary cloud.

High cloud observations can also rely on tall objects such as mountains and buildings to estimate cloud heights. The cloud bottom height of convective clouds can also be used for reference by empirical formula: cloud height observation should be combined with water vapor conditions, morning and evening, seasonal changes, and a variety of means to comprehensively consider.

The code of the cloud is to consider the weather physical condition represented by the cloud code. Timing observation does not understand the local weather situation, the cloud code simple according to the observation of the cloud, often with one-sidedness, can not be accurately expressed the meaning of the weather.

The evolution of the cloud system is complex and diverse. Due to the lack of continuous observation of the cloud by the duty officer or the evolution of the cloud, it is very rarely possible to give accurate records and codes for systematic clouds and indicators.

Cloud observations are more complex. In order to master the basic skills, the observer should strengthen the study of theoretical knowledge and constantly summarize and accumulate. Observers should strengthen the ground meteorological observation norms and related knowledge learning, master the principle of cloud formation and the relationship between the weather changes, and strive to improve the quality and level of business; multi-organization collective observation, encourage extensive discussion, do not go through the motions; The cloud can be judged by some modern aids. For example, summer can use radar echo to determine the convective cloud. Usually the satellite cloud image can understand the system of the cloud that I stand in; Strengthening the professional ethics education of the monitors, truly responsible and realistic to keep the true situation of the cloud as seen on duty in accordance with the requirements of the ground observation code, to ensure the authenticity of the data.

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