weather condition research

I need help with a Environmental Science question. All explanations and answers will be used to help me learn.

1) Using www.wunderground.com (Links to an external site.) research the following:

a) Choose 4 different GLOBAL cities at the same time 2 from the northern and 2 from the southern hemisphere, and compile their

daily average pressure and observed weather conditions for 5 days. All you need to do this part

Check doc.

b) Analyze the data and explain the correlations between the daily average pressures and the observed weather conditions.

Weather stations (red dots) are scattered unevenly across the globe. They are especially sparse in Africa and over the oceans. Before scientists could be confident in global temperature records, Hansen needed to demonstrate that widely spaced observations captured global temperature trends accurately. (NASA map by Robert Simmon, based on data from the National Climatic Data Center. (Links to an external site.))