# Understanding GLOBE Student Data. GLOBE students study the environment of our planet.

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Understanding GLOBE Student Data

GLOBE students study the environment of our planet

Studying the global environment seems like an enormous task. How can students participate in such an endeavor?

Students begin by studying their own local environment – looking at the air, the land, the soil, and the water.

Those components represent the Earth systems. Hydrology Atmosphere Land Cover Soil

Raw Data GraphsMaps Students can then visualize data in several different ways.

Data can be displayed as individual data in a map (for instance, this map displays the maximum air temperature in Europe on March 3, 2000).

The data can be placed on an x,y scatter plot, showing the relationship between air temperature and latitude.

Data can also be displayed as contours (for instance, this map displays the maximum air temperature in Eastern U.S. on March 28, 1999). Scientists often ask, Are the data reasonable?

Look at the colors near Chicago and New York City. Where do these colors lie on the temperature scale? Are these temperatures reasonable in late March?

When we display the data in an x,y plot we can see that there may be a couple of errors. 55 C at 40 Latitude and 30 C at 42 Latitude dont seem like reasonable values for late March. What might have happened to cause these errors?

Student data can be compared to Environmental Models Maximum Temperature predicted for this date by the NOAA Environmental Modeling Center Maximum Temperature predicted for this date by the NOAA Environmental Modeling Center Maximum Temperature recorded at GLOBE sites for the preceding 24 hours Maximum Temperature recorded at GLOBE sites for the preceding 24 hours North AmericaEurope

Data can also be displayed in graphs. This is the mean air temperature for a school in Pennsylvania, USA.

Math extension: how is mean temperature calculated?

Data from multiple schools can be displayed in the same graph. This is the mean air temperature for the school in Pennsylvania, USA combined with the mean air temperature for a school in Australia. Can you see how air temperature, and perhaps seasons, differ between Northern and Southern hemispheres?

Data from up to six schools can be displayed in the same graph. This is the mean air temperature for the school in Pennsylvania, USA and the school in Australia combined with the mean air temperature for a school in Benin. Now, air temperature and seasonal fluctuations can be seen for Northern and Southern hemispheres as well as near Equatorial.

Data sets are created on demand. This allows students to get a closer look at a particular year or years.

Data can be displayed in stacked graphs for easier observation.

Graphs of data can also be used as a tool to explain relationships in the natural world. What environmental data might be represented here?

Whatever data are displayed, they seem to be inversely proportional….

What if you knew that the red line represented Surface Water (SW) Temperature?

Henry's Law The value of the Henry's law constant is found to be temperature dependent. The value generally increases with increasing temperature. As a consequence, the solubility of gases generally decreases with increasing temperature. The decrease in solubility of gases with increasing temperature is an example of the operation of Le Chateliers principle.

Henrys Law states that as temperature increases the solubility of a gas decreases. Dissolved Oxygen fits both Henrys law and the pattern of the graph.

Student data can display what Henrys Law states. Notice that as the red line (Water Temperature) increases the green line (Dissolved Oxygen) decreases.

Data from other parts of the world show the same relationship.

What is the relationship between precipitation and soil moisture?

Soil moisture values drop during dry periods and rise again with the introduction of rainfall.

Soil characterization data show Structure; Color; Presence of Nitrogen, Phosphate and Potassium; Consistence; Presence of Roots, Rocks and Carbonates; as well as the distribution of particle sizes (percent of sand, silt and clay) Soil characterization Visualizations

Students can then look beyond GLOBE measurements and begin asking questions about their local environment.

Temperature Precipitation Cases of Malaria Students at this school in Benin graphed cases of malaria with temperature and precipitation.

Students can present their GLOBE research at Student Research Conferences Sibenik, Croatia June 29 - July 4, 2003 Fayetteville, Arkansas, USA June 25 - 28, 2000 Helsinki, Finland June 30 - July 4, 1998

GLOBE Student Learning Expedition: Croatia 2003 Participants included nearly 400 students and teachers from 24 countries. Each country presented their winning research results. Two field campaigns included (inland park and island). Field campaign data was presented by students and scientists. Cultural and leadership values extended. Participating countries: Argentina, Bahrain, Cameroon, Canada, Croatia, Cyprus, Czech Republic, Egypt, Estonia, Finland, Germany, Hungary, Iceland, Japan, Lebanon, Norway, Poland, Qatar, Spain, Switzerland, Tanzania, Thailand, UK and USA. June 28 – July 5 in Šibenik, Croatia

Students can publish their research on the GLOBE Website

GLOBE has trained over 29,000 GLOBE Teachers representing more than 16,000 GLOBE Schools worldwide. Students have entered over 13 million Measurements to date.

GLOBE data collected by student scientists around the world are helping us learn more about our global environment.