Autumn is the perfect time to enjoy the District's outdoor treasures and catch a glimpse of natures splendor seen by our Nation's Founding Fathers. George Washington and Pierre L'Enfant masterful design strategy provides breathtaking open public landscape painted with a mosaic of warm toned shades of orange and gold to purple and scarlet. Autumn's crisp chill and diminishing length of daylight induce trees to shed their green leaves. Temperature, sunlight, and soil moisture greatly influence the quality of the fall foliage display. Before leaves fall in the autumn they pass key nutrients, such as nitrogen and phosphorous, back into the main body of the tree or plant. Species with brighter autumn leaves appear to retain more nutrients than duller-coloured ones. Two pigments play a vital role in this process: Anthocyanins and Carotenoids. Anthocyanins are water-soluble red, rarely blue, pigments found in both the young and old leaves of many plants, while Carotenoids are highly unsaturated fat-soluble yellow-red pigments produced by plants and fungi.
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Yellow sugar maple tree foliage found at Washington DC Tidal basin.
2270 views
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Fall foliage in front of Wasington Monument.
1800 views
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Pigeon flies over tidal basin.
2551 views
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View of the Thomas Jefferson Memorial. Birds are looking for small fish in the Tidal Basin.
1603 views
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Autumn view of Lee Mansion from Memorial Bridge.
1707 views
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George Washington Parkway during Autumn season.
2829 views
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George Washington Parkway during Autumn season.
1511 views
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Thu Nov 15 12:22:07 2007
1699 views
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Fri Nov 16 16:56:01 2007
1608 views
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Fri Nov 16 17:05:15 2007
1619 views
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Fri Nov 16 17:14:19 2007
1640 views
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Fri Nov 16 17:22:18 2007
1572 views
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Mon Nov 19 12:30:05 2007
1547 views
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Mon Nov 19 12:41:08 2007
1567 views
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Mon Nov 19 12:57:27 2007
1567 views
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