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Carbonate compensation depth (CCD) is the depth in the oceans below which the rate of supply of calcite (calcium carbonate) lags behind the rate of solvation, such that no calcite is preserved. Shells of animals therefore dissolve and carbonate particles may not accumulate in the sediments on the sea floor below this depth. Aragonite compensation depth (hence ACD) describes the same behaviour in reference to aragonitic carbonates. Aragonite is more soluble than calcite, so the aragonite compensation depth is generally shallower than the calcite compensation depth.

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  • عمق تعويض الكربونات (ar)
  • Carbonat-Kompensationstiefe (de)
  • Carbonate compensation depth (en)
  • Seuil de compensation des carbonates (fr)
  • Profondità di compensazione dei carbonati (it)
  • 炭酸塩補償深度 (ja)
  • Carbonate compensation depth (nl)
  • Profundidade de compensação dos carbonatos (pt)
  • 碳酸鹽補償深度 (zh)
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  • Carbonate compensation depth (CCD) is the depth in the oceans below which the rate of supply of calcite (calcium carbonate) lags behind the rate of solvation, such that no calcite is preserved. Shells of animals therefore dissolve and carbonate particles may not accumulate in the sediments on the sea floor below this depth. Aragonite compensation depth (hence ACD) describes the same behaviour in reference to aragonitic carbonates. Aragonite is more soluble than calcite, so the aragonite compensation depth is generally shallower than the calcite compensation depth. (en)
  • Le seuil de compensation des carbonates, ou profondeur de compensation des carbonates, souvent abrégé CCD (de l'anglais Carbonates Compensation Depth) est une surface d'équilibre des mers et océans, utilisée notamment dans la reconstitution des conditions de milieux de dépôts. Elle correspond à la profondeur à laquelle la totalité du carbonate de calcium apporté depuis la surface est dissoute. (fr)
  • 炭酸塩補償深度（たんさんえんほしょうしんど、英語: Carbonate Compensation Depth, CCD）とは、海中において炭酸塩化合物（主として炭酸カルシウム）が溶存せずに堆積・沈殿し得る最大深度のこと。CCD以深では、炭酸塩は海中に溶存し炭酸塩海底堆積物が形成されない。 (ja)
  • 碳酸鹽補償深度（英語：carbonate compensation depth）是指海洋中碳酸鈣輸入海底的補給速率與溶解速率相等的深度面，也是海底含碳酸鹽的沉積和非碳酸鹽沉積之間的岩相界面。海水表層碳酸鈣是飽和的，隨著水深的增大，水壓增高，水溫降低，海水中的二氧化碳含量增高，碳酸鈣溶解度增大，在碳酸鹽補償深度溶解量與補給量相抵平衡。 (zh)
  • عمق تعويض الكربونات Carbonate compensation depth واختصاره CCD، هو عمق البحر أو المحيط الذي يزداد عنده معدل ذوبان كربونات الكالسيوم إلى الحد الذي لا يسمح بتراكم أو حفظ أي رواسب أو كائنات كربوناتية على قاع البحر، ويبلغ هذا العمق في المحيط الهادي حوالي 4000 - 5000 متر. كربونات الكالسيوم هي في الأساس غير قابلة للذوبان في المياه السطحية للبحر، اليوم. وأصداف العوالق الجيرية الميتة التي تغطس إلى مياه أعمق تبقى عملياً بدون تغيير حتى تصل the حيث تزيد قابلية الذوبان بشكل هائل. وحتى وصولها إلى CCD يكون كل كربونات الكالسيوم قد ذابت حسب هذه المعادلة: (ar)
  • Die Carbonat-Kompensationstiefe (abgekürzt CCD, von englisch carbonate compensation depth) bezeichnet eine Grenzfläche in der Tiefsee, unterhalb derer keine Carbonatschlämme – das Ausgangsmaterial für eine bestimmte Art von Kalkstein – abgelagert werden. Ursache ist die Auflösung der zum Meeresgrund abgesunkenen Partikel aus Calciumcarbonat (Calcit und Aragonit) infolge der geringen Temperaturen, des hohen Druckes und der relativ hohen Kohlenstoffdioxid­konzentration im Tiefenwasser. (de)
  • La profondità di compensazione dei carbonati, in sigla CCD (dall'inglese Carbonate (o Calcite) Compensation Depth), è la profondità nelle acque oceaniche al di sotto della quale il tasso di accumulo della calcite (la forma più comune del carbonato di calcio) è inferiore al suo tasso di solvatazione e pertanto la calcite viene disciolta nell'acqua. Si ha analogamente una profondità di compensazione dell'aragonite (ACD) che indica il livello in cui si instaura lo stesso fenomeno per l'aragonite, l'altra comune forma polimorfa del carbonato di calcio. (it)
  • De carbonate compensation depth (Engels voor carbonaat-compensatie diepte, afgekort CCD) is een diepte in de oceaan waaronder de aanvoer van calciumcarbonaat (CaCO3, in de vorm van de mineralen calciet en aragoniet) gelijk is aan de snelheid van oplossen van calciumcarbonaat. Daardoor kan onder deze diepte geen calciumcarbonaat voorkomen. De CCD werd ontdekt door de Schots-Canadese oceanograaf (1841-1914). (nl)
  • Profundidade de compensação dos carbonatos (em inglês, carbonate compensation depth - CCD) é a profundidade oceânica abaixo da qual a taxa de formação de carbonato de cálcio no sedimento é menor que sua taxa de solvatação. Assim, praticamente não há preservação de sedimento carbonático abaixo dessa profundidade. Há duas formas de carbonato de cálcio no oceano: calcita e aragonita. Consequentemente, o termo pode ser diretamente aplicado a esses minerais. A profundidade de compensação da aragonita refere-se à preservação de carbonatos aragoníticos no sedimento e a profundidade de compensação da calcita refere-se à preservação de carbonatos calcíticos no sedimento. A aragonita, contudo, é mais solúvel que a calcita, de forma que sua profundidade de compensação é menor. (pt)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Calcareous_sediment_in_the_ocean.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Carbonate_compensation_concept.png
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