- active layer
- The top layer of ground subject to annual thawing and freezing in areas underlain by permafrost.NRC
Glossary of landform and geologic terms. 2013.
active layer
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Active layer — In environments containing permafrost, the active layer is the top layer of soil that thaws during the summer and freezes again during the autumn. In all climates, whether they contain permafrost or not, the temperature in the lower levels of the … Wikipedia
active layer — (in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer. * * * … Universalium
active layer — the upper few metres of soil in a periglacial area which undergoes thawing in summer and is prone to mass movement relative to the permafrost layer below … Geography glossary
active layer — (in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer … Useful english dictionary
Active pixel sensor — An active pixel sensor (APS) is an image sensor consisting of an integrated circuit containing an array of pixel sensors, each pixel containing a photodetector and an active amplifier. There are many types of active pixel sensors including the… … Wikipedia
Layer 2 Tunneling Protocol — In computer networking, the Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs). History and future Published in 1999 as proposed standard RFC 2661, L2TP has its origins primarily in two older … Wikipedia
Layer 2 Tunneling Protocol — L2TP im TCP/IP‑Protokollstapel: Anwendung L2TP Transport UDP Internet IP (IPv4, IPv6) Netzzugang Ethernet Token … Deutsch Wikipedia
Layer Two Tunneling Protocol — L2TP im TCP/IP‑Protokollstapel: Anwendung L2TP Transport UDP Internet IP (IPv4, IPv6) Netzzugang Ethernet Token … Deutsch Wikipedia
Active Format Description — In television technology, Active Format Description (AFD) is a standard set of codes that can be sent in the MPEG video stream or in the baseband SDI video signal that carries information about their aspect ratio and active picture… … Wikipedia
Active Denial System — Humvee with ADS mounted The Active Denial System (ADS) is a non lethal, directed energy weapon developed by the U.S. military.[1] It is a strong millimeter wave transmitter primarily used for crowd control (the goodbye effect [ … Wikipedia
