{'fraction_non_alphanumeric': 0.01995798319327731, 'fraction_numerical': 0.01050420168067227, 'mean_word_length': 5.664335664335664, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Long Environmental Records Derived From Tree-ring Sequence In Washington And Northern Oregon

Tree-growth records provide an important source of proxy climatic data for evaluating the uniqueness of 20th-century climates in the Pacific Northwest. Reconstructions of mean annual temperature from upper treeline sites show a prolonged temperature increase during the 20th-century that exceeded the magnitude and duration of any warm period over the past four centuries. Growth of low to mid-elevation continuous forests of western Washington increase during the 20th-century, suggesting an amelioration of climatic limitations. In contrast, tree growth reached minimum values during the 20th-century at drought-sensitive, forest-grassland borders east of the Cascade Mountains. Precipitation reconstructions based on lower treeline sites show severe droughts during 20th-century, but no longterm change in mean precipitation compared to earlier centuries.