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Documentary climate data describe evidence of past climate arising from predominantly written historical documents such as diaries, chronicles, newspapers, or logbooks. Over the past decades, historians and climatologists have generated numerous document-based time series of local and regional climates. However, a global dataset of documentary climate time series has never been compiled, and documentary data are rarely used in large-scale climate reconstructions. Here, we present the first global multi-variable collection of documentary climate records. The dataset DOCU-CLIM comprises 621 time series (both published and hitherto unpublished) providing information on historical variations in temperature, precipitation, and wind regime. The series are evaluated by formulating proxy forward models (i.e., predicting the documentary observations from climate fields) in an overlapping period. Results show strong correlations, particularly for the temperature-sensitive series. Correlations are somewhat lower for precipitation-sensitive series. Overall, we ascribe considerable potential to documentary records as climate data, especially in regions and seasons not well represented by early instrumental data and palaeoclimate proxies.

Para conocer la evolución geomorfológica del referido cañón, así como paraestimar la influencia dela karstificación en dicha evolución, se ha enfocado este estudio en varias fases: 1. Mediciones y tratamiento estadístico de los sistemas de diaclasas existentes. La populación estadística asciende a 596 estaciones. 2. Comparación de los resultados estadístiicos de los sistemas de diaclasas con las direcciones dominantes del cañón y con las direcciones preferenciales de conductos kársticos en las cavidades topografiadas. 3. Contrastación del conjunto de resultados con las macroformas regionales existentes que, de antiguo a moderno, son: a - Glacis b - Plataforma de erosión kárstica c - Paleocauce, y d - Cañón propiamente dicho. 4. Como denominador común, todo el conjunto de datos y su tratamiento interrelacionado se apoya tanto en la geología estructural de la zona, a base de interpretación fotogeológica y trabajos de campo, como en la ejecución de una detallada columna estratigráfica para definir, mediante lámina delgada, las características texturales de las rocas carbonáticas donde está emplazado el karst. 5. Toda la información anterior viene suplementada por el estudio detallado bajo un punto de vista geoquímico, que enmarca claramente las relaciones entre la composición química de las aguas kársticas y la composición litológica de los terrenos atravesados por el Duratón. 6. En definitiva, se demuestra que el carácter meandriforme del cañón del Duratón no obedece a un fenómeno de sobreimposición o epigénesis, sino que ha sido motivado por consideraciones estructurales. Desde ahora, sospechamos que muchos ejemplos similares cuya génesis ha sido atribuida a sobreimposición, deben ser revisados, ya que, probablemente, la causa sea otra., Depto. de Geodinámica, Estratigrafía y Paleontología, Fac. de Ciencias Geológicas, TRUE, pub

Documentary climate data describe evidence of past climate arising from predominantly written historical documents such as diaries, chronicles, newspapers, or logbooks. Over the past decades, historians and climatologists have generated numerous document-based time series of local and regional climates. However, a global dataset of documentary climate time series has never been compiled, and documentary data are rarely used in large-scale climate reconstructions. Here, we present the first global multi-variable collection of documentary climate records. The dataset DOCU-CLIM comprises 621 time series (both published and hitherto unpublished) providing information on historical variations in temperature, precipitation, and wind regime. The series are evaluated by formulating proxy forward models (i.e., predicting the documentary observations from climate fields) in an overlapping period. Results show strong correlations, particularly for the temperature-sensitive series. Correlations are somewhat lower for precipitation-sensitive series. Overall, we ascribe considerable potential to documentary records as climate data, especially in regions and seasons not well represented by early instrumental data and palaeoclimate proxies.