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Find the most up-to-date version of STANAG at Engineering STANAG Climatic Conditions. Realisation. A1 Extreme hot dry. A2 Hot dry. A3 Intermediate. B1 Wet warm. B2 Wet hot. B3 Humid hot. STANAG by identifying potential damaging effects that natural and induced environmental conditions have on materiel, and by providing guidance on the.
This Agreement is inteded as a guidance document primarily for use when preparing the climatic clauses and other test conditions in requirements documents of materiel intended for use by the NATO forces.
The requirements documents should state in which regions of the world and for what length of time a particular item of materiel will be operated, stored and transported during its planned service life. These regions should be identified in the requirements documents in terms of one or more of the fourteen distincitive climatic categories nato stanag which eleven refer to land surfaces of the world and three to the sea surfaces.
Standardization Agreement The prinicipal locations of the land surface categories in this Agreement are shown on the world map Fig. The sea surface categories are associated loosely with tropical, temperatue and arctic waters but no zones of demarcation are shown as nato stanag is considered that ships could enter all waters during service.
The temperature and accompanying humidity conditions which occur throughout the whole year in each of the climatic categories are presented at Annex B in the form of the number of days of the year nato stanag which on average, a specific temperature is just attained or exceeded. In addition, the total period that a specific temperature is exceeded during the whole year is also given.
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For any particular item of the materiel, the requirements documents should state, for design purposes, acceptable probabilities of occurrence of temperature and humidity. For materiel located on the land surface, the requirements documents should specify a set of conditions from the high temperature categories A1, A2 or A3the low temperature nato stanag C0, C1, C2, C3 or C4 and one or more sets from those categories where high humidity is the principal consideration B1, B2 or B3.
For packaged or unpackaged stores liable to be exposed directly or indirectly to solar radiation, it is appropriate to use the cstorage and transitc temperature cycles for the categories concerned. The diurnal variation is unlikely to exceed 2 millibars.
Humidities for the A2 storage condition vary too widely between different situations to be represented by a single set of conditions. In strict terms, Category A3 applies only to those areas which experience moderately high temperatures and moderately low humidites for at least part of the year. It is particularly representative of conditions in Europe except the most southern parts, Canada, the northern United States and the southern part of the Australian continent.
However for the purpose of this Agreement, Category A3 is considered to apply to all land masses except those designated as Category A1 or A2 areas in Fig 1A. The general data for both the meteorological and storage conditions are given in Figs 10 to In addition, the cycle of maximum temperature and associated humidity, recommended as design criteria for materiel exposed to the A3 meteorological condition is given in Table 9.
A recommended cycle for the A3 storage condition based on a similar criterion is also given in Table 9. The highest temperature ever reliably recorded for the A3 meteorological condition is 42qC. Category B1 applies to those areas which experience moderately high temperatures accompanied by continuous very high relative humidity.
These conditions are found in rain forests and other tropical regions during periods of continuous cloud cover, where direct solar radiation is not a significant factor. The meteorological condition is derived from conditions recorded in Singapore.
As direct solar radiation is negligible on days these temperature and humidity conditions occur, the same set of values is given for the storage condition. The general data for both the meteorological and storage conditions are given in Figs 14 to For materiel, it is recommended that trials be based on both the 7 days of saturation at 24qC and the temperature and humidity diurnal cycles which are representative of conditions for the remainder of the year.
These data are given in Table Category B2 applies to those areas which experience moderately high temperature accompanied by high humidity and high direct solar radiation.
These conditions occur in exposed areas of the wet tropical regions. The meteorological condition is derived from observations made ot the Gulf of Mexico coastal stations and subsequently confirmed by observations in other tropical areas.
The storage temperatures have been derived as equal to those for the A2 storage condition to take into account the relatively high ambient air temperatures and direct solar radiation which can occur in regions of the B2 category on days when clear skies prevail. The general data for both the meteorological and storage conditions are given in Figs 18 to In addition, the diurnal cycles of maximum temperatue and humidity, recommended as design critera for materiel exposed to the B2 meteorological and storage conditions are given in Table Although both higher temperatures and higher humidites are known to occur in regions of the B2 category, they rarely do so simultaneously at the same location.
Category B3 applies to those areas which experience moderately high temperatures accompanied by high water vapour content of the air near the ground in addition to high levels of solar radiation. These conditions occur in hot areas near large expanses of water such as the Persian Gulf and the Red Sea.
The meteorological condition is derived from observations made at Dhahran and other hot, humid stations. The storage temperatures have been defined as equal to those for the A1 storage condition to take into account the relatively high ambient air temperatures and direct solar radiation which can occur in regions of the B3 category on days when clear skies prevail.
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Terlebih dahulu model dipelajari kestabilan dan keteramatannya, kemudian model didiskritkan. Jumlah ensemble yang digunakan pada penelitian ini adalah, dan ensemble. Hasil menunjukkan bahwa semakin banyak variabel yang digunakan sebagai variabel pengukuran, hasil estimasi terhadap curah hujan akan semakin daur karbon. Enzim yang berperan dalam proses tersebut adalah enzim nitrogenase.
Nitrifikasi melibatkan dua tahapan proses yaitu nitritasi kemudian nitratasi. Nitritasi adalah pengubahan amonium menjadi nitrit NO2.Bila tidak cukup oksigen akan terjadi denitrifikasi. It is unlikely that the temperature and humidity conditions encountered in any given year during field trials at a particular location will be the same as those defined for the climatic categories of that location.
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These regions should be identified in the requirements documents in terms of one or more of the fourteen distincitive climatic categories nato stanag which eleven refer to land surfaces of the world and three to the sea surfaces. The general data for both the meteorological and storage conditions are given in Figs 6 to 9. To avoid limitations in deployment, this approach should be used as infrequently as possible.