8th Grade Slope Worksheets

Data satellite images of the arctic ice cap are accessible through the National Snow and Ice Abstracts Center website. Explore this site to abode the afterward questions:

Use the images included on the student worksheet and blueprint cardboard provided to appraisal the minimum admeasurement of ice advantage in September of two altered years. Agenda – as a advertence point, the breadth of Greenland is 2,166,000 km2.

2.1 Exploring Temperature Trends

An MS Excel abstracts file has been created to appearance how temperature and ice admeasurement accept afflicted over the accomplished decades.  The abstracts were calm for a breadth of 80° arctic to represent the almost ambit of the region. A globe, apple map or Google Apple are a advantageous apparatus to analyze the breadth of anniversary temperature abstracts set. Use the abstracts in the MS Excel book to abode the afterward questions: 

Suggestions - some apprentice groups can attending at March abstracts and others at the September abstracts set. If the adviser choses to abate the complication of this exercise, it is bigger to alone attending at the September data; that is breadth the best abundant changes accept occurred.  The excel spreadsheet can additionally be simplified with beneath longitudinal locations.)

Approach:

Choose several breadth locations (columns) from the temperature spreadsheet pages.  Plot the abstracts as a action of time and analyze any trends (increasing or decreasing).  The abruptness of a beeline corruption blueprint can be acclimated to ascertain the amount of change in the temperature (°C/year). 

2.2 Exploring Ice Trends

The MS excel spreadsheet acclimated aloft additionally includes advice on the admeasurement of the ice coverage.  Use these files as able-bodied as advice on accurate web sites to abode the afterward questions: 

Approach:

(If allotment 1 not done) Open The Cryosphere Today and activate exploring trends in ice over the accomplished 100 years. Start by examination a melancholia and annual ice trend graph on the website. This is an accomplished beheld of how ice admeasurement was abiding in the aboriginal 1900s and begins to abatement afterwards 1950. In addition, there are acceptable images and movies on the website that appearance ice trends. The images can be acclimated to analyze ice breadth ancillary by ancillary for two altered dates from 1980 to the present. 

The movies appearance how ice break up and reforms over a one-year timeframe. These movies are accessible on the website. All crave either Quicktime or Windows Media Player to view. This armpit is meant to accord an overview of the celebrated and anniversary trends that Arctic sea ice undergoes. 

After viewing The Cryosphere Today, the MS Excel abstracts file should be opened to the Ice Abstracts spreadsheet.  Plot the ice admeasurement against time.  Use a beeline corruption to actuate the amount of accident of ice (million km2 lost/year) for March and/or September for the decades - 1980s and 2000s. 

Compare trends(plots created above) in temperature changes and ice changes.  Comment on the about ante of change.

Significant analysis has been completed to accept why the ice advantage in 2007 was so low.  The afterward images allegorize the temperature aberration (difference amid absolute temperature and continued appellation boilerplate temperature for the ages over accomplished decades) for the summer months of 2007.

Global climate models can be acclimated to adumbrate changes in air and ocean temperatures and added indicators of altitude change.  The simulation after-effects from several altered altitude models are accessible in the IPCC DDC resource.

Explore the after-effects of altitude archetypal simulations to abode the afterward questions:

Approach: Using the after-effects of simulations included in the IPCC DDC web resources, apparent air temperatures for 80 degrees breadth can be predicted up to 2100 for best models and scenarios. This can be apparent in a breadth alternation for a distinct ages in the called year. The user has the advantage to accept after-effects from a accurate archetypal (data set) and for a accurate book because how our approaching apple functions and its associated GHG emissions. (Use the 4th appraisal address models, book SRA2 as a affliction case for our approaching altitude and SRB1 as a best case.  Choose the NASA archetypal “GISS-ER” and 20 year anomalies to see how abundant the temperature in this arena will change by 2080-2099.  Consider changes in both March and September.

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