The phrase "abrupt fall in the" is correct and usable in written English.
It can be used to describe a sudden decrease in something, often in contexts such as economics, weather, or performance metrics.
Example: "The abrupt fall in the stock market caught many investors off guard."
Alternatives: "sudden drop in the" or "sharp decline in the".
During the later months of 1917 the use of convoys caused an abrupt fall in the sinkings by U-boats: 500,500 tons in May, 300,200 in September, and only about 200,600 in November.
Nonetheless, the Minutemen claim credit for the arrival of an extra 500 Border Patrol agents, an unusual effort by Mexico's armed forces to deter border crossings and an abrupt fall in the number of illegal immigrants.
An abrupt fall in the pressure of the system is observed at the onset of hydrate nucleation.
Migraine usually returns quickly after delivery, probably triggered by the abrupt fall in the level of estrogens, by a postpartum depression or because of the new parental role and all that it implies (sleep deprivation, anxiety, worry and psychological adaptation).
One dose of short-acting oxytetracycline results in an abrupt fall in the temperature in TBF infected lambs and relapses are common [ 21].
Such a process might be initiated by the changes in osmotic pressure across the lens boundary induced by the abrupt fall in the glucose concentration in the aqueous.
This is reflected by the abrupt decrease in CRP levels.
For movements that (in the same way) involve markets, however, the plots do not correspond to the scale-free profile (Fig. 6), but show a characteristic frequency in the region corresponding to the region 2 of Figs. 3 and 4, and an abrupt fall in frequency in the third region.
The situation in Norway with a strong sudden increase in price of sterilization with a corresponding abrupt fall in rates is to the best of our knowledge unique.
Strong inhibition of the OSN activity follows the abrupt fall in light intensity.
The abrupt fall in sterilization rates which was restricted to interval sterilization clearly coincided with the introduction of the new copayment system and we are certain that this fall was directly linked to the increase in copayment.
