This topic contains a solution. Click here to go to the answer

Author Question: Describe in detail the three phases of numerical forecasting. What will be an ideal ... (Read 34 times)

Collmarie

  • Hero Member
  • *****
  • Posts: 569
Describe in detail the three phases of numerical forecasting.
 
  What will be an ideal response?

Question 2

Currently, forecasts are least accurate in predicting
 
  A) temperature.
  B) wind.
  C) pressure distributions.
  D) precipitation amounts.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

blakcmamba

  • Sr. Member
  • ****
  • Posts: 335
Answer to Question 1

Answer: The three phases include analysis, prediction, and postprocessing. First is the analysis phase, in which observations are used to supply values corresponding to the starting (current) state of the atmosphere for all the variables carried in the model. Prediction phase: Fundamentally, the job of a numerical model is to solve the basic equations describing atmospheric behavior. Beginning with values delivered by the analysis phase, the model uses physical equations to obtain new values a few minutes into the future. The process is then repeated, using the output from the first step as input for the next set of calculations. This procedure is performed over and over as many times as necessary to reach the end of the forecast period (24 hours, 48 hours, or whatever). This is called the prediction phase of the model run. This involves many billions of calculations for each time step, despite the fact that there are just a handful of fundamental atmospheric variables (temperature, pressure, wind velocity vector, density, and moisture). Postprocessing phase: The conditions forecast by the model at regular intervals (for example, every 12 hours) are represented on a grid for mapping and other display purposes.

Answer to Question 2

Answer: D




Collmarie

  • Member
  • Posts: 569
Reply 2 on: Jul 14, 2018
Excellent


Joy Chen

  • Member
  • Posts: 354
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

For a complete list of videos, visit our video library