Question

data source: united states national oceanic and atmospheric administration/earth system research laboratory, physical sciences division
click the blue words to correct the statement below.
on october 1, 2015, the weather in salt lake city was influenced by an air mass that was cooler and had lower specific humidity than the air mass that influenced the weather in labrador city that day.

Explanation:

1. First, identify locations: Salt Lake City is near 40°N, 112°W; Labrador City is near 53°N, 66°W.
2. Analyze the specific humidity map: The area near Salt Lake City has lower specific humidity (lighter green, ~16-18 g/kg) than Labrador City's region (darker green, ~22-24 g/kg).
3. Analyze air mass temperature: Salt Lake City is in a continental air mass (cooler), while Labrador City is influenced by a maritime air mass (warmer, from the Atlantic).
4. Correct the false descriptors: The original statement incorrectly calls Salt Lake City's air mass "cooler" relative to Labrador City's, and claims it has "lower" humidity (which is correct, but the temperature comparison is wrong). The correct comparison is that Salt Lake City's air mass was warmer and had lower specific humidity than Labrador City's.

Answer:

On October 1, 2015, the weather in Salt Lake City was influenced by an air mass that was warmer and had lower specific humidity than the air mass that influenced the weather in Labrador City that day.