Reading Ancient Climate Records

Question 1

The table below shows the observed global average temperature anomaly (°C) relative to the 1951‑1980 baseline for selected years, followed by the projected increase from a global climate model that predicts a steady rise of 0.02 °C each year after 2020. Year | Anomaly (°C) 2000 | 0.42 2005 | 0.55 2010 | 0.63 2015 | 0.87 2020 | 1.02 Based on the observed 2020 anomaly and the model’s projected rate of increase, what is the best estimate of the global temperature anomaly in the year 2030?

Accepted Answer

1.22 °C

Answer

1.12 °C

Answer

0.98 °C

Answer

1.32 °C

Question 2

The table shows the observed global average surface temperature anomaly (relative to the 1951‑1980 average) for selected years. Year | Temperature Anomaly (°C) -----|--------------------------- 2000 | 0.30 2005 | 0.45 2010 | 0.55 2015 | 0.68 2020 | 0.78 A global climate model projects that the temperature anomaly will increase by **0.2 °C each decade** for the next several decades. Based on the observations and this model, what is the best estimate for the temperature anomaly in the year **2030**?

Accepted Answer

0.98°C

Answer

0.78°C

Answer

0.88°C

Answer

1.08°C

Question 3

Scientists recorded the following global temperature anomalies (°C) relative to the 1950 baseline: Year — Anomaly 2000 — 0.35 2005 — 0.45 2010 — 0.55 2015 — 0.65 2020 — 0.75 If the same rate of change continues, what is the best estimate of the global temperature anomaly in the year 2030 relative to the 1950 baseline?

Accepted Answer

0.95°C

Answer

1.05°C

Answer

0.75°C

Answer

0.85°C

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